Trouvez votre prochaine offre d’emploi ou de mission freelance DHCP (Dynamic Host Configuration Protocol)

Ce qu’il faut savoir sur DHCP (Dynamic Host Configuration Protocol)

DHCP (Dynamic Host Configuration Protocol) est un protocole réseau qui permet d’attribuer automatiquement des adresses IP et d’autres paramètres réseau aux appareils connectés, comme les ordinateurs, les imprimantes ou les smartphones. Il simplifie la gestion des réseaux en éliminant la nécessité de configurer manuellement chaque appareil. Lorsque un appareil se connecte à un réseau, le serveur DHCP lui assigne une adresse IP unique, ainsi que d'autres informations essentielles, telles que le masque de sous-réseau, la passerelle par défaut et les serveurs DNS. Ces adresses peuvent être attribuées pour une période déterminée (bail) et sont renouvelées automatiquement si nécessaire. Le DHCP est largement utilisé dans les réseaux domestiques, professionnels et les datacenters pour garantir une configuration réseau rapide, flexible et sans conflit d’adresses IP. Il est intégré dans les routeurs et les serveurs, et joue un rôle clé dans la gestion des infrastructures réseau modernes.

Votre recherche renvoie 80 résultats.
Freelance

Mission freelanceIngénieur Systèmes, Réseaux & Cloud Confirmé (H/F) –Toulouse

CELAD
Publiée le

1 an
300-330 €
Toulouse, Occitanie
Vous aimez les environnements où l'infrastructure est au cœur de la qualité de service délivrée aux clients ? Vous recherchez un poste qui combine administration système, cloud, sécurité, projets d'évolution et amélioration continue ? Nous recrutons un Ingénieur Systèmes, Réseaux & Cloud pour rejoindre une équipe Product & Technology engagée dans l'exploitation et l'évolution d'une plateforme SaaS à forte exigence de disponibilité et de sécurité. Vous interviendrez sur l'ensemble du cycle de vie des infrastructures, des opérations quotidiennes aux projets de transformation, dans un environnement où l'automatisation, la fiabilité et la cybersécurité occupent une place centrale. Vos missions : 🎯 Administrer et faire évoluer les infrastructures on-premise et cloud afin de garantir leur disponibilité et leurs performances Assurer le support de niveau 3 et intervenir sur les incidents complexes liés aux systèmes, réseaux et plateformes Contribuer au renforcement de la sécurité, à la supervision des environnements, à la gestion des sauvegardes et aux dispositifs de reprise d'activité Participer aux projets d'automatisation, de déploiement et d'industrialisation des infrastructures Accompagner l'amélioration continue des pratiques à travers la documentation, la veille technologique et les démarches DevSecOps Environnement technique : 🛠️ Vous évoluerez dans un environnement riche et varié : Cloud : OVHcloud, Microsoft Azure Systèmes : Windows Server, Linux Virtualisation : VMware, Proxmox VE, Nutanix Réseaux : Active Directory, TCP/IP, DHCP, VPN, routage IP Web : Microsoft IIS, Apache, Nginx Bases de données : SQL Server, MySQL, PostgreSQL Supervision : Centreon, Prometheus Stockage : NAS, SAN Scripting : PowerShell, Bash Infrastructure as Code : Terraform, Ansible
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Freelance

Mission freelanceIngénieur Orchestration et Automatisation Réseau (H/F)

CELAD
Publiée le

1 an
360-420 €
Toulouse, Occitanie
Vous aimez concevoir des solutions qui automatisent des infrastructures réseau complexes plutôt que d'enchaîner les tâches manuelles ? Vous recherchez un environnement international où l'automatisation, l'orchestration et l'innovation sont au cœur des projets ? Nous recrutons un(e) Ingénieur Orchestration et Automatisation Réseau pour rejoindre une équipe d'ingénieurs qui conçoit et fait évoluer des plateformes d'orchestration réseau à grande échelle. Votre rôle sera de transformer des besoins techniques en workflows automatisés, afin d'améliorer la qualité de service, la fiabilité des infrastructures et l'efficacité opérationnelle. Vos missions : 🎯 Concevoir l'architecture des workflows et procédures d'orchestration réseau. Développer et maintenir des solutions d'automatisation pour les opérations réseau. Intégrer différents systèmes via des API afin d'automatiser les fonctions réseau. Développer des scripts et composants permettant l'orchestration de services à grande échelle. Participer au déploiement, aux évolutions et à la maintenance des plateformes d'orchestration. Collaborer étroitement avec les équipes Réseau, Systèmes et Développement pour construire une infrastructure robuste, maintenable et évolutive. Participer aux phases de cadrage technique, de conception jusqu'à la mise en production des projets. Garantir la cohérence entre les services conçus et les engagements de qualité de service. Environnement technique : 🛠️ Vous évoluerez dans un environnement mêlant automatisation, développement et infrastructures réseau. Vous travaillerez notamment avec : Plateformes d'orchestration : Itential, n8n Automatisation : Ansible Développement : Python, Node.js, JavaScript, YAML API : REST, Swagger / OpenAPI, WSDL Données : JSON, SQL Systèmes : Linux, Bash Technologies réseau : Fortinet SDN / NFV Ethernet, MPLS, QinQ BGP, OSPF DNS, DHCP, NTP, RADIUS/AAA Supervision réseau Une expérience des technologies SatCom constitue un plus.
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Freelance

Mission freelanceSystems Engineer (VMware, Veeam & IAM)

Wemanity
Publiée le
Microsoft Entra ID
okta
saml

6 mois
400-550 €
Issy-les-Moulineaux, Île-de-France
Nous cherchons un ingénieur systèmes chargé de gérer, de sécuriser et de faire évoluer son infrastructure informatique centrale. À ce poste, vous devrez concilier l'excellence opérationnelle au quotidien (Run) et des projets d'optimisation architecturale à fort impact (Build). Vous serez le pilier technique de nos environnements virtualisés, de nos stratégies de sauvegarde robustes et de notre cadre moderne de gouvernance des identités. Principales responsabilités Virtualisation et systèmes centraux : Gérer et optimiser l infrastructure VMware vSphere (ESXi, vCenter, clusters HA/DRS) ainsi que la topologie de serveurs hybrides Windows/Linux. Intervenir en tant qu'expert en matière d'Active Directory, de DNS, de DHCP et de stratégies de groupe. Gestion des identités et des accès (IAM) : Assurer le déploiement, la gouvernance du cycle de vie et la sécurité de notre architecture d'identité hybride à l'aide de Microsoft Entra ID et d'Okta (y compris l'authentification unique (SSO), l'authentification multifactorielle (MFA), l'accès conditionnel, SAML et OAuth 2.0). Sauvegarde et reprise après sinistre : Concevoir, valider et maintenir des stratégies de continuité d'activité infaillibles à l'aide de Veeam Backup & Replication, en mettant l'accent sur les sauvegardes immuables et la réplication multisite. Fourniture d'applications et de postes de travail : Administrer et optimiser notre écosystème Citrix Virtual Apps and Desktops, en gérant les plateformes Netscaler, Delivery Controllers et StoreFront. Opérations et automatisation : Assurer la résolution des incidents de niveau 2/3, automatiser les workflows répétitifs à l'aide de PowerShell ou Bash, et utiliser Zabbix/Nagios pour surveiller de manière préventive l'état de santé du système. Expertise technologique Virtualisation VMware vSphere, ESXi, vCenter, conception de clusters HA et DRS. Identité et gestion des accès (IAM) Microsoft Entra ID, Okta, SAML, OAuth 2.0, OIDC, provisionnement SCIM. Protection des données Veeam Backup & Replication, sauvegardes « air-gapped » / immuables, exécution de plans de reprise après sinistre (DRP). Systèmes d'exploitation Windows Server (de 2012 à 2025), Active Directory. Compétences de base en RHEL/Ubuntu. Mise à disposition des applications Citrix Workspace (v13/v14), Netscaler, StoreFront, Delivery Controllers. Surveillance et ITSM Zabbix, Nagios, ServiceNow, et conformité aux cadres ITIL.
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CDI

Offre d'emploiIT Support Analyst/Engineer with Level 1 and Level 2

Nexus Jobs Limited
Publiée le

£50k-60k
Grand Londres, Royaume-Uni
IT Support Analyst/Engineer with Level 1 and Level 2 Role Description This full-time IT Support Analyst/Engineer role covers both Level 1 and Level 2 support and is offered on a hybrid basis, with work primarily in London and some work from home flexibility. Day-to-day responsibilities include handling incoming support tickets, responding to user queries, and providing first-line technical assistance for hardware, software, and network issues. The role also involves performing more advanced second-line diagnostics, resolving complex incidents, escalating problems when required, and updating documentation and knowledge bases. The IT Support Analyst/Engineer will install and configure systems, manage user accounts and access permissions, monitor system performance, and assist with routine maintenance tasks and upgrades. Collaboration with other IT team members and clear communication with non-technical users are key aspects of the position. Qualifications Candidates should possess strong Technical Support and Information Technology skills, including experience with common operating systems, hardware, and business applications. Candidates should possess solid Analytical Skills and Troubleshooting abilities to diagnose issues, identify root causes, and deliver effective solutions. Candidates should possess clear and professional Communication skills, with the ability to explain technical concepts to users at different levels of technical understanding. Relevant certifications such as CompTIA A+, Network+, Microsoft, or similar credentials are beneficial, along with experience in Level 1 and Level 2 support environments. Ability to work in a hybrid setting, manage priorities in a busy service desk environment, and maintain a customer-focused, inclusive approach when supporting diverse user groups. For this position you will have at least 5 years experience in IT as an IT Support Engineer with 1 and 2 Level support experience - ideally in the Banking/Financial industry. In-depth knowledge of and troubleshooting experience with Windows, Office applications and conferencing applications. Responsible for the support and maintenance of the IT infrastructure and to provide IT support to staff and other group colleagues. To assist in the response to service outages and other IT related problems as well as maintenance and upkeep of for security of the systems in place. To provide IT Support and assistance to the branch's staff in a timely fashion. Responsible for the maintenance of the IT infrastructure of the Branch by providing first & Second line support of software, hardware and networking that incudes installation, configuration and troubleshooting. Support endpoint security standards (antivirus/firewall/patching/two-factor authentication). Provide day to day support to the Admin and HR function to cover: joiners/leavers/ movers process, CCTV & Paxton Card Access. Assist the IT Manager in delivering various IT related projects by managing the day to day operational aspects of such projects. End User Computing support for all staff. (e.g. Install, configure, and maintain desktops, laptops, printers, Phones/Mobiles and other IT equipment.) Networking Fundamentals – DNS, DHCP, TCP/IP, and LAN/WAN. Good understanding of cybersecurity measures Coordinator between the London Users and Group IT Security on all requests for systems access and to ensure that such permissions are provided promptly, are regularly updated and that the Group Access Matrix Protocol is followed at all times. Preserve the Assets of the Office by implementing Disaster Recovery and back up procedures and ensuring that the standards comply with Group requirements. Provide IT support to ensure the smooth running of daily and periodic reports for the London Compliance team to ensure adherence to the Anti Money Laundering Provisions . Undertake Data Extraction for reporting requirements for all the other stakeholders at the branch. To hold Administrator function for some of the systems housed at the Office. Responsible for the granting of access and maintenance of system matrixOverall networking equipment monitoring (i.e. Network Switches, Firewall and other appliances) and support inclusive of the server room. To plan and carry out maintenance checks to ensure IT Operations, infrastructures are running smoothly and ensure daily routine task completeness. Manage inventory of computers, network equipment including tracking of purchased equipment and services. To maintain and ensure that the BCP site is always ready for continuous bank operations Important Business Services - IBS owner is to ensure the resilience of the IBS theyare responsible for (Ensure appropriate RCSAs, CETs, KRIs are in place to monitor procedures and controls within their units) Assist the HOD/Manager with implementing/putting in place, any applicable training/guidance/SOPs to staff relating to cyber security & operational resilience. To maintain the branch Avaya IP Office Phone system and to ensure that the recording system is always up and running at all times. To perform monthly infrastructure test and report for Risk Assessment. Manage Incident Handling procedure (This includes monitoring as well as post –incident follow up). Respond to IT service requests and incidents in a timely manner, prioritizing based on business impact, especially for critical banking functionsSupport the Branch operations as and when needed and any other tasks assigned by Management of the Branch. Data Integrity and Compliance Operationalise data strategy and communicate to the Data Owner or the Management any changes in their BAU requirements which involve data. To ensure all data worked on and or/shared with internal/external clients are accurate, compliant and maintained in accordance with Company's data quality standards. Handle all data in strict alignment with the General data protection Regulations (GDPR) principles. Keep track of documents created by the team. Escalate any suspected data breaches or privacy issues to the DPO promptly and without delays. Ensuring any data sharing requests are discussed with HOD/DPO so that prior authorisation is given and follows GDPR / department's SOPs. Collaborate with DPO on data Protection Impact Assessment when introducing new systems or processes to ensure privacy risks are mitigated at the outset. Technical Skills Required Proficient in common operating systems (Windows 11 and Linux, Server 2016 and later) Providing AV support for branch Software proficiency – O365, Onedrive,Teams, Sharepoint, Bloomberg, FXT, SEP, SEE, ME Endpoint Protection, Murex, Swift, 1AML, SIBS, GFMS, COP, Refinitiv, Syncovery, SQL Server, Paxton, VBR, VRO and VeeamOne Proficient in Imaging windows machines, image creation & management, GPO, and AD Networking Fundamentals – DNS, DHCP, TCP/IP, and LAN/WAN. Good understanding of Vmware; ESXI, vSphere, vCenter, Fortigate Firewalls, Cisco Switches Good understanding of patching practices and troubleshooting Install, configure, and maintain desktops, laptops, printers, Phones/Mobiles and other IT equipment. AV support (conference phones, Logitech meeting room solutions etc) Proficient in programming languages Project management Data analysis and reporting Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) This is a 5 days in the office role in Central London. Salary for this role will be circa £55K - £60K. Do send your CV to us in Word format along with your salary and availability.
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CDI

Offre d'emploiSenior IT Infrastructure Officer

Nexus Jobs Limited
Publiée le

£70k-75k
Grand Londres, Royaume-Uni
Senior IT Infrastructure Officer Our Client a bank, in Central London are looking for an experienced IT Infrastructure professional who is ideally looking for their next challenge in a dynamic and regulated financial services environment. We are seeking a highly skilled Senior IT Infrastructure Officer to lead the management, security, and continuous improvement of our enterprise IT infrastructure. The Senior IT Infrastructure Officer will be playing a key role in ensuring the availability, resilience, and performance of critical systems while supporting technologies across servers, networks, cloud services, cybersecurity, and business-critical financial applications. The candidate must have strong technical expertise in Windows/Linux, VMware, Microsoft 365, networking, cybersecurity, and infrastructure management who also enjoys solving complex challenges and driving operational excellence. Must have 7 years' experience in enterprise infrastructure, ideally within banking or financial services, and be passionate about delivering secure, reliable IT services.. The role will be Monday to Friday, 9:30am to 5:30pm and reporting into the Head of IT & Data. Due to the nature of the role, the individual is expected to work in our offices, 5 days per week, during their probationary period Infrastructure & Systems Management Administer, maintain, and optimize Windows and Linux server environments. Manage VMware virtualized infrastructure (vSphere 8 and above). Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). Support endpoint DLP, SIEM, and security monitoring tools (e.g., Splunk, Tenable). Manage patching processes using ManageEngine Patch Manager Plus. Support Microsoft 365 services and related cloud technologies. In depth understanding of Cyber security Monitor system performance, capacity, availability, and infrastructure health. Ensure compliance with IT governance, security policies, and operational standards. End-User Computing & Branch Support Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. Manage OS deployment, imaging, image creation, maintenance, and software packaging. Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. Resolve technical incidents and service requests in line with agreed SLAs. 3. Enterprise Applications & Financial Systems Support Support and administer business-critical applications, including: Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP Support enterprise file synchronization and replication solutions (e.g., Syncovery, other SFTP). 4. Networking • Configure and support Cisco switches and routers. • Administer FortiGate firewall environments. • Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management Support vulnerability management using tools such as Tenable. Manage security monitoring and log analysis tools (e.g., Splunk). Perform SSL/TLS certificate lifecycle management using OpenSSL. Create and manage CSRs, certificate chains, and private keys. Ensure adherence to cybersecurity policies, standards, and regulatory requirements. Support physical access control systems (e.g., Paxton) Operating Systems Windows 11 Windows Server 2019/2022 (or equivalent enterprise environments) Red Hat Linux Infrastructure & Virtualization VMware vSphere / vCenter (v8.0.3 and above) Veeam Backup & Replication Veeam ONE, VRO Microsoft Office 365 ManageEngine Patch Manager Plus SAAS solutions SQL Server Security Symantec Endpoint Protection (SEP) Symantec Endpoint Encryption (SEE) SentinelOne – EDR/ XDR Endpoint DLP solutions Firewall administration Vulnerability management tools (e.g., Tenable) SIEM tools (e.g., Splunk) Networking Cisco Switches and Routers FortiGate Firewalls LAN/WAN networking and routing Hardware & Storage Dell PowerEdge Servers Dell PowerVault SAN Storage Education Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) The role is based in Central London and initally will be be 5 days per week in the office. This is a 12 month FTC position. The salary for the role will be circa £70K - £75K. Do send your CV to us in Word format along with your salary and availability.
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Freelance

Mission freelanceNetwork Engineer Expert

LeHibou
Publiée le
Aruba
BGP (Border Gateway Protocol)
Cisco

6 mois
600 €
Paris, France
Notre client dans le secteur Assurance recherche un/une Network Engineer Expert H/F Description de la mission : Contexte The organization is seeking an expert-level network engineering profile to lead the design, deployment, standardization, and support of a corporate office network infrastructure. The role focuses on ensuring robust, scalable, and highly available network services across enterprise environments, with strong specialization in campus LAN, WLAN, and network authentication services. Mission The mission is to design and evolve enterprise network infrastructure, produce the associated architecture and operational documentation, and provide expert-level support for critical and escalated incidents. The role also acts as a subject matter expert to influence architecture standards, promote best practices, and drive network standardization across the organization. Principales responsabilités Design, implement, and troubleshoot office LAN/WAN routing and switching environments in medium to large enterprise contexts Manage the full lifecycle of campus networks, including deployments, hardware refresh, OS upgrades, and patching Produce high-quality network documentation, including High-Level Designs (HLD), Low-Level Designs (LLD), operational procedures, and as-built network diagrams Provide third-level operational support for critical network issues, with a focus on high availability, performance, incident resolution, and prevention Handle complex escalated incidents and perform packet-level analysis to diagnose network and application-layer issues Design and implement enterprise-grade WiFi environments and support complex WLAN deployment models Contribute to the design and implementation of SD-WAN over diverse underlay networks Use network monitoring, bandwidth, and performance analysis tools to support operations and continuous improvement Act as an SME to define standards, promote best practices, and support network standardization across teams Support automation, backup processes, and REST API integrations through scripting Guide cross-functional teams through proactive communication and mentorship Environnement technique Network vendors: Cisco, Aruba Network domains: LAN, WAN, WLAN, campus networks, network authentication services, SD-WAN Aruba technologies: Aruba CX, VSF/VSX, Dynamic Segmentation, NAE analytics, colorless ports, NetEdit, Aruba Central, ClearPass, EdgeConnect Cisco technologies: Catalyst, Aironet, ISE Protocols and services: TCP/IP, HTTP/HTTPS, DNS, DHCP, IPsec, OSPF, BGP, QoS, STP, HSRP, VRRP, RADIUS, TACACS+, SNMP, NTP, NetFlow, 802.1X, VXLAN Analysis and monitoring: Wireshark, IPFIX collectors, SNMP-based NMS, LogicMonitor, SolarWinds, NetScout, Syslog servers, log analysis platforms Automation: Shell, Perl, Python, REST API Frameworks: ITIL Livrables attendus High-Level Designs (HLD) Low-Level Designs (LLD) Operational procedures As-built network diagrams Standardized and scalable network architecture documentation Incident analysis and troubleshooting outputs for critical network issues Profil recherché Expérience Minimum 5 years of network experience At least 2 years in a complex enterprise network engineering role within a sizable organization Hands-on experience designing, implementing, and troubleshooting enterprise LAN/WAN routing and switching Experience managing the full lifecycle of campus network environments Strong hands-on experience with enterprise-grade WiFi deployments Compétences techniques Strong expertise in Cisco and Aruba network environments Advanced knowledge of modern LAN technologies and Aruba CX features Deep understanding of TCP/IP and application-layer protocols Strong knowledge of routing, switching, authentication, and network services including OSPF, BGP, QoS, STP, HSRP/VRRP, RADIUS/TACACS+, SNMP, NTP, NetFlow, 802.1X, VXLAN, and IPsec Experience with centralized network management, monitoring, and analysis platforms Ability to produce high-quality technical documentation Basic to intermediate scripting skills in Shell, Perl, or Python Good understanding of ITIL-based processes including service request, change, problem, and incident management Professional-level certifications from major vendors such as Cisco (CCNP, CCIE) and HPE Aruba (ACSP, ACCP) Compétences personnelles Excellent troubleshooting capability and ability to resolve complex issues under time pressure Strong communication skills with the ability to explain technical topics to non-technical stakeholders Teamwork, knowledge sharing, and support for colleagues Analytical thinking, problem-solving, and sound decision-making under pressure Attention to detail in design, implementation, and documentation Strong task and priority management to meet project and operational deadlines Service-oriented mindset and responsiveness to user and client needs Adaptability, continuous learning, and ability to handle multiple priorities Leadership and mentorship for cross-functional teams Langues Fluent English, both written and verbal Compétences / Qualités indispensables : Enterprise LAN/WAN routing and switching, Cisco and Aruba network engineering, WLAN / enterprise WiFi deployment, SD-WAN design and implementation, Advanced network troubleshooting and L3 support, Technical documentation (HLD/LLD) Compétences / Qualités qui seraient un + : Hands-on experience with private and public cloud networkingInformations concernant le télétravail : Oui — 3 jours/semaine
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CDD

Offre d'emploiSenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Publiée le

£70k-75k
Grand Londres, Royaume-Uni
Senior IT Infrastructure & Systems Lead Our Client a bank, in Central London are looking for an experienced IT Infrastructure professional who is ideally looking for their next challenge in a dynamic and regulated financial services environment. We are seeking a highly skilled Senior IT Infrastructure Officer to lead the management, security, and continuous improvement of our enterprise IT infrastructure. The Senior IT Infrastructure Officer will be playing a key role in ensuring the availability, resilience, and performance of critical systems while supporting technologies across servers, networks, cloud services, cybersecurity, and business-critical financial applications. The candidate must have strong technical expertise in Windows/Linux, VMware, Microsoft 365, networking, cybersecurity, and infrastructure management who also enjoys solving complex challenges and driving operational excellence. Must have 7 years' experience in enterprise infrastructure, ideally within banking or financial services, and be passionate about delivering secure, reliable IT services.. The role will be Monday to Friday, 9:30am to 5:30pm and reporting into the Head of IT & Data. Due to the nature of the role, the individual is expected to work in our offices, 5 days per week, during their probationary period Infrastructure & Systems Management Administer, maintain, and optimize Windows and Linux server environments. Manage VMware virtualized infrastructure (vSphere 8 and above). Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). Support endpoint DLP, SIEM, and security monitoring tools (e.g., Splunk, Tenable). Manage patching processes using ManageEngine Patch Manager Plus. Support Microsoft 365 services and related cloud technologies. In depth understanding of Cyber security Monitor system performance, capacity, availability, and infrastructure health. Ensure compliance with IT governance, security policies, and operational standards. End-User Computing & Branch Support Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. Manage OS deployment, imaging, image creation, maintenance, and software packaging. Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. Resolve technical incidents and service requests in line with agreed SLAs. Enterprise Applications & Financial Systems Support Support and administer business-critical applications, including: Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP Support enterprise file synchronization and replication solutions (e.g., Syncovery, other SFTP). Networking • Configure and support Cisco switches and routers. • Administer FortiGate firewall environments. • Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management Support vulnerability management using tools such as Tenable. Manage security monitoring and log analysis tools (e.g., Splunk). Perform SSL/TLS certificate lifecycle management using OpenSSL. Create and manage CSRs, certificate chains, and private keys. Ensure adherence to cybersecurity policies, standards, and regulatory requirements. Support physical access control systems (e.g., Paxton) Operating Systems Windows 11 Windows Server 2019/2022 (or equivalent enterprise environments) Red Hat Linux Infrastructure & Virtualization VMware vSphere / vCenter (v8.0.3 and above) Veeam Backup & Replication Veeam ONE, VRO Microsoft Office 365 ManageEngine Patch Manager Plus SAAS solutions SQL Server Security Symantec Endpoint Protection (SEP) Symantec Endpoint Encryption (SEE) SentinelOne – EDR/ XDR Endpoint DLP solutions Firewall administration Vulnerability management tools (e.g., Tenable) SIEM tools (e.g., Splunk) Networking Cisco Switches and Routers FortiGate Firewalls LAN/WAN networking and routing Hardware & Storage Dell PowerEdge Servers Dell PowerVault SAN Storage Education Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) The role is based in Central London and initially will be be 5 days per week in the office. This is a 12 month FTC position. The salary for the role will be circa £70K - £75K. Do send your CV to us in Word format along with your salary and availability.
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Freelance
CDI

Offre d'emploiIngénieur Systèmes & Cybersécurité Senior

QUALIS ESN
Publiée le
Linux
TCP/IP
VLAN

6 mois
40k-45k €
400-500 €
Le Plessis-Pâté, Île-de-France
Le poste comporte une forte composante sécurisation des infrastructures (Hardening) en complément des activités d'audit et de conformité. Le collaborateur assurera également la supervision technique de 2 personnes et participera aux différentes activités d'ingénierie, de déploiement et de maintien en condition opérationnelle des environnements IT. Missions principales Ingénierie Systèmes & Réseaux • Participer aux réunions techniques et ateliers d'architecture. • Définir, déployer et maintenir les environnements IT et Réseau. • Participer à la conception des solutions techniques répondant aux exigences du projet. • Assurer le traitement des incidents, anomalies et demandes d'évolution. • Participer aux phases d'intégration, de validation et d'essais techniques. • Rédiger et maintenir la documentation technique et de sécurité. Cybersécurité, Audit & Hardening Le poste est fortement orienté vers la sécurisation opérationnelle des systèmes. Audit de sécurité • Réalisation d'audits techniques des environnements Windows et Linux. • Analyse des vulnérabilités et des écarts de conformité. • Élaboration des plans de remédiation. • Accompagnement des équipes dans l'application des recommandations de sécurité. Hardening des serveurs Windows (70 % de l'activité) • Désactivation des services et fonctionnalités inutiles. • Renforcement des politiques de sécurité (GPO, politique de mots de passe, restrictions d'accès). • Gestion et revue des comptes à privilèges. • Durcissement Active Directory. • Application des correctifs de sécurité. • Réduction de la surface d'exposition des systèmes. • Contrôle et maintien de la conformité sécurité. Hardening des serveurs Linux (30 % de l'activité) • Désactivation des services inutiles. • Renforcement des paramètres de sécurité du système d'exploitation. • Gestion des comptes, groupes et privilèges. • Sécurisation des accès SSH. • Application des correctifs et remédiation des vulnérabilités. • Contrôle régulier de la conformité des environnements Linux. Encadrement et coordination • Supervision fonctionnelle de 2 collaborateurs techniques. • Répartition des tâches et suivi de l'avancement. • Contrôle qualité des livrables. • Support technique de niveau expert auprès des équipes projet. • Participation à l'identification et au suivi des risques techniques. • Coordination avec les différentes parties prenantes du projet. Compétences techniques requises Environnement Windows (70 %) • Windows Server 2016 / 2019 / 2022. • Active Directory. • GPO. • DNS / DHCP. • PowerShell. • VMware ou Hyper-V. • Gestion des sauvegardes et PRA/PCA. • Sécurisation des environnements Microsoft. • Gestion des vulnérabilités et remédiation. Environnement Linux (30 %) • RedHat, CentOS, Rocky Linux ou Ubuntu. • Administration système avancée. • Gestion des services et des performances. • Scripting Shell. • Sécurisation des environnements Linux. • Gestion des mises à jour et correctifs de sécurité.
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CDI

Offre d'emploiAdministrateur Systèmes & Cloud Azure

MGI Consultants
Publiée le
Azure
Cloud
Intune

45k-50k €
La Défense, Île-de-France
Rejoignez-nous pour une mission chez notre client du secteur de la gestion immobilière basée à La Défense (92) en tant qu'Administrateur Systèmes & Cloud Azure. L'Administrateur Systèmes, Réseaux et Cloud assure la gestion, l'exploitation et l'évolution des infrastructures IT de l'entreprise, couvrant les environnements On-Premise et Cloud. Il est garant du maintien en conditions opérationnelles (MCO) et en conditions de sécurité (MCS) des systèmes et réseaux.. Missions : Administration Systèmes • Installer, configurer et administrer les systèmes d'exploitation Windows Server et Linux. • Gérer les environnements de virtualisation (Hyper-V). • Administrer les annuaires et services associés (Active Directory, Azure AD, DNS, DHCP, GPO). • Superviser et administrer les solutions de messagerie et de collaboration (Exchange Online, M365, Teams). Administration Réseaux • Administrer les réseaux type LAN, WAN, Wi-Fi et VPN, SD WAN • Mettre en place et administrer des solutions de sécurisation réseau (IPS/IDS, filtrage web). Administration Cloud • Administrer les environnements Microsoft Azure (IaaS, PaaS, SaaS). • Gérer Azure AD, Intune, Exchange Online, NinjaOne et les solutions de sécurité associées (MFA, Conditional Access). • Superviser les workloads cloud (machines virtuelles, bases de données, stockage, réseaux virtuels). Exploitation & Supervision • Déployer et administrer les outils de supervision et de monitoring (, Zabbix, Grafana ). • Suivre la capacité, les performances et la disponibilité des infrastructures. • Diagnostiquer et résoudre les incidents systèmes, réseaux et cloud. • Assurer la traçabilité et l'exploitation des événements (logs, SIEM, Sentinel). • Contribuer aux procédures de gestion des incidents majeurs et gestion de crise. Support & Assistance • Apporter un support de niveau 2/3 aux utilisateurs et aux équipes support. • Assurer une assistance technique lors des déploiements et des incidents. • Accompagner les équipes métiers et les collaborateurs de la DSI dans leurs besoins spécifiques. • Former et sensibiliser aux bonnes pratiques d'usage des systèmes RUN & Maintien Opérationnel • Veiller à la conformité permanente des postes de travail (antivirus, EDR/XDR, correctifs, chiffrement, conformité Intune). • Contrôler régulièrement l'état de mise à jour des serveurs, Appliance réseau et équipements de sécurité. • Assurer le suivi du patch management et signaler toute dérive de conformité. • Surveiller l'état des sauvegardes et garantir leur bon déroulement (tests de restauration inclus). • Mettre en place des contrôles automatisés (reporting de conformité, tableaux de bord MCO/MCS). • Participer à la gestion proactive de la capacité et anticiper les saturations (CPU, mémoire, stockage, réseau). • Assurer la continuité des services (tests PRA/PCA, bascule régulière, exercices de crise). • Analyser les alertes et vulnérabilités détectées, appliquer les remédiations nécessaires en lien avec la sécurité. • Garantir la bonne application des politiques de sécurité (MFA, durcissement, segmentation, PSSI). • Contribuer à l'amélioration continue des processus RUN (standardisation, industrialisation, automatisation). Documentation et Reporting : • Maintenir une documentation technique précise sur les environnements, les sauvegardes et les procédures opérationnelles. • Produire des rapports réguliers sur les performances, les incidents et les améliorations mises en œuvre. Informations clés : Démarrage : ASAP Lieu : La Défense 92 Contrat : CDI uniquement Rytrhme : 1 à 2 jours de TT Rémunération : 45 à 50 K€
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Freelance
CDI

Offre d'emploiIngénieur Réseau Senior

Gamme solutions
Publiée le
Cybersécurité

1 an
Cergy, Île-de-France
Dans le cadre du renforcement de l'équipe Infrastructure & Réseau, notre client recherche un Ingénieur Réseau Senior afin d'accompagner la conception, le déploiement, l'exploitation et la sécurisation de ses infrastructures réseau dans un environnement complexe, multisites et international. Contexte de la missionVous interviendrez sur des infrastructures réseau critiques avec un rôle d'expertise technique autour des activités de BUILD & RUN, de l'évolution des architectures et du maintien en conditions opérationnelles. Vos missionsArchitecture & évolution des infrastructures réseau Participer à la conception et à l'évolution des architectures LAN, WAN, WiFi, VPN et Sécurité Contribuer à la standardisation et à l'optimisation des infrastructures réseau Accompagner les projets de transformation et de modernisation Déploiement & intégration Installer, configurer et mettre en production les équipements réseau Réaliser l'intégration de nouvelles solutions dans le respect des standards techniques et des exigences de sécurité Participer aux phases de tests, validation et mise en production Exploitation & support expert Assurer le maintien en conditions opérationnelles des infrastructures réseau Diagnostiquer et résoudre les incidents complexes (N2/N3) Mettre en œuvre les actions correctives et préventives Participer à l'amélioration continue de la qualité de service Performance & supervision Suivre la disponibilité et les performances des infrastructures Exploiter les outils de supervision et de monitoring Participer aux actions d'optimisation des capacités réseau Sécurité réseau Appliquer et faire évoluer les politiques de sécurité réseau Administrer les solutions de filtrage, VPN, segmentation et contrôle d'accès Participer aux audits de sécurité et aux plans de remédiation Documentation & projets Maintenir la documentation technique et les schémas d'architecture Participer aux projets d'évolution, migration et interconnexion Assurer une veille technologique sur les solutions réseau Compétences techniques requisesProtocoles et technologies réseau TCP/IP BGP OSPF VLAN DHCP / DNS LAN / WAN WiFi VPN Routage et commutation Technologies et constructeurs Cisco Fortinet Palo Alto Juniper F5 Aruba Riverbed Zscaler Citrix Efficient IP Sécurité réseau Firewall IDS / IPS Segmentation réseau Contrôle d'accès Filtrage des flux Bonnes pratiques de sécurité Outils Supervision et monitoring réseau Outils de diagnostic Suivi des performances et capacité réseau Profil recherchéIngénieur Réseau confirmé avec minimum 5 ans d'expérience Formation Bac+5 ou diplôme d'ingénieur Expertise sur des environnements réseau complexes et multisites Solide expérience sur les technologies Cisco / Fortinet / Palo Alto Bonne maîtrise des architectures réseau et des problématiques de sécurité Expérience en environnement RUN / MCO Qualités attenduesAutonomie et rigueur Excellentes capacités d'analyse et de résolution de problèmes Bon relationnel avec les équipes techniques, métiers et fournisseurs Sens du service et de la qualité Capacité à évoluer dans un contexte international Informations complémentaires📍 Localisation : Cergy-Pontoise 🌍 Contexte : environnement international 👤 Pas de management d'équipe 🤝 Nombreuses interactions avec les équipes Infrastructure, Sécurité, Architecture, Support et Projets 🇬🇧 Anglais professionnel indispensable
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CDI

Offre d'emploiIT Infrastructure & Systems Manager

Nexus Jobs Limited
Publiée le

£60k-65k
Grand Londres, Royaume-Uni
IT Infrastructure & Systems Manager We are seeking an experienced and highly motivated Senior IT Infrastructure Manager with at least 7 to 10 years experience to oversee, manage, and continuously improve the organization's IT infrastructure, enterprise systems, network environment, and end-user computing services. The successful candidate will ensure the availability, security, performance, and resilience of critical business systems while leading technical teams and supporting key stakeholders across the organization. This role requires a strong blend of technical expertise, leadership capability, operational excellence, and stakeholder management skills, within a complex enterprise environment that includes financial, trading, and treasury systems. Role Description The IT Infrastructure & Systems Manager is a full-time role based in London with a hybrid working arrangement, combining on-site presence with some work from home. This role is responsible for managing and maintaining the organization's core IT infrastructure, including servers, networks, storage, and cloud services. Day-to-day tasks include overseeing system administration, monitoring performance and availability, implementing security best practices, and coordinating backup and disaster recovery processes. The role involves leading and supporting IT operations, resolving complex technical issues, and ensuring that systems, applications, and services remain stable and secure. The IT Infrastructure & Systems Manager will collaborate with internal stakeholders, manage vendors and service providers, contribute to IT strategy and roadmaps, and document procedures, standards, and configuration changes. Qualifications Strong foundation in Information Technology and IT Operations, including infrastructure design, capacity planning, and service management. Hands-on experience with System Administration and Troubleshooting across Windows and/or Linux environments, virtualization, and cloud platforms. Proficiency in Network Security, including firewalls, VPNs, endpoint protection, access control, and security monitoring. Proven ability to manage IT projects, prioritize tasks, and deliver improvements on time and within scope. Excellent communication and stakeholder management skills, with the ability to explain technical concepts to non-technical audiences. Experience leading or mentoring IT team members or support staff is highly desirable. Relevant certifications (e.g., ITIL, Microsoft, Cisco, CompTIA, or cloud certifications) are an advantage. Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent practical experience. Infrastructure & Systems Management Administer, maintain, and optimize Windows and Linux server environments. Manage VMware virtualized infrastructure (vSphere 8 and above). Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). Support endpoint DLP, SIEM, and security monitoring tools (e.g., Splunk, Tenable). Manage patching processes using ManageEngine Patch Manager Plus. Support Microsoft 365 services and related cloud technologies. In depth understanding of Cyber security Monitor system performance, capacity, availability, and infrastructure health. Ensure compliance with IT governance, security policies, and operational standards. End-User Computing Support Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. Manage OS deployment, imaging, image creation, maintenance, and software packaging. Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. Resolve technical incidents and service requests in line with agreed SLAs. Enterprise Applications & Financial Systems Support Support and administer business-critical applications, including: Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP Support enterprise file synchronization and replication solutions (e.g., Syncovery, other SFTP). Networking Configure and support Cisco switches and routers. Administer FortiGate firewall environments. Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management Support vulnerability management using tools such as Tenable. Manage security monitoring and log analysis tools (e.g., Splunk). Perform SSL/TLS certificate lifecycle management using OpenSSL. Create and manage CSRs, certificate chains, and private keys. Ensure adherence to cybersecurity policies, standards, and regulatory requirements. Support physical access control systems (e.g., Paxton) Governance, Documentation & Process Improvement Develop, maintain, and enforce IT policies, standards, and operational procedures. Produce system architecture diagrams, technical documentation, SOP's, and performance reports. Identify and drive opportunities for automation and service improvement. Support technology planning, infrastructure modernization, and transformation initiatives. Operating Systems Windows 11 Windows Server 2019/2022 (or equivalent enterprise environments) Red Hat Linux Infrastructure & Virtualization VMware vSphere / vCenter (v8.0.3 and above) Veeam Backup & Replication Veeam ONE, VRO Microsoft Office 365 ManageEngine Patch Manager Plus SAAS solutions SQL Server Security Symantec Endpoint Protection (SEP) Symantec Endpoint Encryption (SEE) SentinelOne – EDR/ XDR Endpoint DLP solutions Firewall administration Vulnerability management tools (e.g., Tenable) SIEM tools (e.g., Splunk) Networking Cisco Switches and Routers FortiGate Firewalls LAN/WAN networking and routing Hardware & Storage Dell PowerEdge Servers Dell PowerVault SAN Storage Technical Competencies Data analysis and operational reporting Desktop and laptop support Infrastructure monitoring and performance management Certificate lifecycle management (SSL/TLS) Windows imaging and deployment, GPO, NTFS PowerShell scripting SQL Server administration Understanding of software development lifecycle (SDLC) and deployment processes Architecture review and systems optimization Asset management 7+ years of experience in enterprise IT infrastructure and systems administration. Experience within financial services, banking, trading, or treasury environments. Proven experience managing mission-critical infrastructure and applications. Experience operating within regulated and security-focused environments. Able to provide support to VIP stakeholders This is a hybrid role with 3 days at the office in Central London. Salary for this role will be in the range £60K - £65K. Do send your CV to us in Word format along with your salary and availability.
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CDI

Offre d'emploiAWS Cloud Infrastructure Analyst

Nexus Jobs Limited
Publiée le

US$90k-110k
Trumbull, Connecticut, États-Unis d'Amérique
AWS Cloud Infrastructure Analyst The AWS Cloud Infrastructure Analyst is a hands-on role planning and managing AWS cloud infrastructure delivery, including daily management, capacity planning, and participating in defining the Company's global infrastructure architecture. The Analyst will ensure the quality and timely delivery of technology efforts to support strategic infrastructure projects and works closely with other teams to define infrastructure requirements to support applications, security, and compliance initiatives. The AWS Cloud Infrastructure Analyst works with different teams to design and implement cloud solutions that fit organizational requirements. As an expert in AWS infrastructure and security configurations, recommends standards and security requirements that match written information security policy. Prior experience in an international enterprise environment is essential . Responsibilities: Collaborate with IT teams for input and operational requirements to design and implement overall cloud infrastructure and security strategy. Coordinate and lead infrastructure\security initiatives in the AWS cloud. Serve as the technical lead in AWS cloud DR and recovery strategies that align with information security policies. Develops and implements backup and recovery strategies to support data retention requirements. Evaluates and designs highly available, scalable, and redundant applications in the AWS cloud. Participate in the development and testing of an incident response plan for incidents that affect the cloud infrastructure. Ensure infrastructure is maintained and security is designed for every deployment. Manages projects to ensure that the delivery is on-time, within budget, and adopted to meet the company's information protection requirements. Actively supports the organization's cloud initiatives and responds to business requirements while achieving SLAs in place to support the organization's needs. Adhere to applicable change management policy and procedure. Qualifications: Bachelor's degree required. Candidates must possess significant analytical skills, which evolved from early academic training in Networking, Information Systems, Computer Science, or similar discipline. Minimum of 5 years' experience in a variety of infrastructure technologies. Ability to lead multi-disciplined teams when conducting incident root cause analysis. Serve as the technical expert in the AWS cloud. Desired Qualifications: Any Azure, AWS, GCP, Nutanix, Meraki, Cisco, or security certifications. Knowledge and experience with Microsoft Office and Visio Knowledge of WAN technologies, including MPLS, SD-WAN Knowledge of cloud-provided infrastructure (AWS, GCP) Prior experience implementing/maintaining Cisco ELA products including DNA, Firepower, ISE Management console, Umbrella, AMP, Stealth watch, as well as Splunk, SolarWinds, Varonis, and Darktrace Project management skills are highly desirable Proficiency in hybrid cloud, virtualization, Server OS, SAN, SMTP, email relay, email security, Active Directory, Group Policy, DNS, DHCP Working knowledge of Cisco network switches, routers, firewalls and VPN, DLP, antivirus, IDS/IPS, SIEM, SQL VDI, and Security concepts ITIL Foundation Certification Proficient in continuous integration, continuous delivery concepts (DevOps), with DevSecOps highly desirable. Previous experience in a HIPAA/FDA regulated environment Competencies: To perform the job successfully, an individual should demonstrate the following behaviors: Strong English oral and written communication skills Motivated and curious, willing to ask questions, research issues, and take on challenging projects/assignments; creative, brings innovative ideas to the table, exhibits self-confidence. Possesses the ability to organize and follow-through on multiple tasks. Recognizes and attends to vital details with accuracy and efficiency. Effectively prioritizes the work of staff members. Works to complete goals, tasks, and plans. Anticipates potential problems and analyzes alternative solutions. Develops/ maintains effective working relationships by listening attentively to others; communicates ideas clearly (written & verbal) while relating to people in an open/ sincere manner and participating effectively in meetings. You will also help find solutions, identify problems, communicate appropriately with the supervisor, and interact with co-workers. Able to maintain a calm and reliable demeanor in the face of challenges. Diagnoses problems efficiently, gather sufficient input before making decisions or plans, makes timely decisions, quickly determines sources of problems, identifies information needed to solve problems, analyzes and communicates issues with effective alternative solutions to the team. Sensitive & responsive to internal customer needs, demonstrate customer service skills, maintains a positive attitude, is willing to listen to customer problems, seeks solutions, and stays in tune with customers' changing needs. The role will be based in Trumbull, Connecticut USA. The salary for this role will be in the range $90K - $110K. Please do send your CV to us in Word format along with salary and availability.
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CDI

Offre d'emploiSenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Publiée le

£65k-75k
Grand Londres, Royaume-Uni
Senior IT Infrastructure & Systems Lead Our Client a bank, in Central London are looking for an experienced IT Infrastructure professional who is ideally looking for their next challenge in a dynamic and regulated financial services environment. We are seeking a highly skilled Senior IT Infrastructure Officer to lead the management, security, and continuous improvement of our enterprise IT infrastructure. The Senior IT Infrastructure Officer will be playing a key role in ensuring the availability, resilience, and performance of critical systems while supporting technologies across servers, networks, cloud services, cybersecurity, and business-critical financial applications. The candidate must have strong technical expertise in Windows/Linux, VMware, Microsoft 365, networking, cybersecurity, and infrastructure management who also enjoys solving complex challenges and driving operational excellence. Must have 7 years' experience in enterprise infrastructure, ideally within banking or financial services, and be passionate about delivering secure, reliable IT services.. The role will be Monday to Friday, 9:30am to 5:30pm and reporting into the Head of IT & Data. Due to the nature of the role, the individual is expected to work in our offices, 5 days per week, during their probationary period This role is totally hands-on. Role Description The Senior IT Infrastructure & Systems Lead is a full-time hybrid role based in London, with flexibility for some work-from-home arrangements. This role is responsible for overseeing the day-to-day operation, maintenance, and improvement of the company's IT infrastructure, including networks, servers, and core systems. The person in this role will lead and mentor technical staff, manage system performance and availability, and coordinate responses to incidents and service requests. Typical tasks include monitoring network and system health, implementing security measures, resolving complex technical issues, planning upgrades, and collaborating with stakeholders to align technology solutions with business needs. The role also involves vendor management, documentation of infrastructure and procedures, and contributing to IT strategy and roadmap decisions. Qualifications Candidates should possess strong skills in Network Administration and Information Technology for managing and optimizing infrastructure and systems. Candidates should possess solid Technical Support and Troubleshooting skills to diagnose, resolve, and prevent complex IT issues. Candidates should possess expertise in Network Security to implement, monitor, and improve security controls and practices. Extensive experience in leading IT infrastructure projects, including planning, implementation, and migration activities. Proven ability to manage and mentor IT teams, with strong communication and stakeholder management skills. Experience with server and cloud technologies, virtualization, backup and recovery, and IT monitoring tools. Relevant professional certifications (e.g., CompTIA Network+, CCNA, MCSE, or similar) are beneficial. Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent practical experience. Infrastructure & Systems Management · Administer, maintain, and optimize Windows and Linux server environments. · Manage VMware virtualized infrastructure (vSphere 8 and above). · Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. · Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. · Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). · Support endpoint DLP, SIEM, and security monitoring tools (e.g., Splunk, Tenable). · Manage patching processes using ManageEngine Patch Manager Plus. · Support Microsoft 365 services and related cloud technologies. · In depth understanding of Cyber security · Monitor system performance, capacity, availability, and infrastructure health. · Ensure compliance with IT governance, security policies, and operational standards. End-User Computing & Branch Support · Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. · Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. · Manage OS deployment, imaging, image creation, maintenance, and software packaging. · Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. · Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. · Resolve technical incidents and service requests in line with agreed SLAs. Enterprise Applications & Financial Systems Support · Support and administer business-critical applications, including: · Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP · Support enterprise file synchronization and replication solutions (e.g., Syncovery, other SFTP). Networking • Configure and support Cisco switches and routers. • Administer FortiGate firewall environments. • Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management · Support vulnerability management using tools such as Tenable. · Manage security monitoring and log analysis tools (e.g., Splunk). · Perform SSL/TLS certificate lifecycle management using OpenSSL. · Create and manage CSRs, certificate chains, and private keys. · Ensure adherence to cybersecurity policies, standards, and regulatory requirements. · Support physical access control systems (e.g., Paxton) Operating Systems · Windows 11 · Windows Server 2019/2022 (or equivalent enterprise environments) · Red Hat Linux Infrastructure & Virtualization · VMware vSphere / vCenter (v8.0.3 and above) · Veeam Backup & Replication · Veeam ONE, VRO · Microsoft Office 365 · ManageEngine Patch Manager Plus · SAAS solutions · SQL Server Security · Symantec Endpoint Protection (SEP) · Symantec Endpoint Encryption (SEE) · SentinelOne – EDR/ XDR · Endpoint DLP solutions · Firewall administration · Vulnerability management tools (e.g., Tenable) · SIEM tools (e.g., Splunk) Networking · Cisco Switches and Routers · FortiGate Firewalls · LAN/WAN networking and routing Hardware & Storage · Dell PowerEdge Servers · Dell PowerVault SAN Storage Education Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) The role is based in Central London and initially will be be 5 days per week in the office. This is a 12 month FTC position. The salary for the role will be circa £70K - £75K. Do send your CV to us in Word format along with your salary and availability.
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CDI

Offre d'emploiSenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Publiée le

£70k-75k
Grand Londres, Royaume-Uni
Senior IT Infrastructure & Systems Lead Our Client a bank, in Central London are looking for an experienced IT Infrastructure professional who is ideally looking for their next challenge in a dynamic and regulated financial services environment. We are seeking a highly skilled Senior IT Infrastructure Officer to lead the management, security, and continuous improvement of our enterprise IT infrastructure. The Senior IT Infrastructure Officer will be playing a key role in ensuring the availability, resilience, and performance of critical systems while supporting technologies across servers, networks, cloud services, cybersecurity, and business-critical financial applications. The candidate must have strong technical expertise in Windows/Linux, VMware, Microsoft 365, networking, cybersecurity, and infrastructure management who also enjoys solving complex challenges and driving operational excellence. Must have 7 years' experience in enterprise infrastructure, ideally within banking or financial services, and be passionate about delivering secure, reliable IT services.. The role will be Monday to Friday, 9:30am to 5:30pm and reporting into the Head of IT & Data. Due to the nature of the role, the individual is expected to work in our offices, 5 days per week, during their probationary period This role is totally hands-on. Role Description The Senior IT Infrastructure & Systems Lead is a full-time hybrid role based in London, with flexibility for some work-from-home arrangements. This role is responsible for overseeing the day-to-day operation, maintenance, and improvement of the company's IT infrastructure, including networks, servers, and core systems. The person in this role will lead and mentor technical staff, manage system performance and availability, and coordinate responses to incidents and service requests. Typical tasks include monitoring network and system health, implementing security measures, resolving complex technical issues, planning upgrades, and collaborating with stakeholders to align technology solutions with business needs. The role also involves vendor management, documentation of infrastructure and procedures, and contributing to IT strategy and roadmap decisions. Qualifications Candidates should possess strong skills in Network Administration and Information Technology for managing and optimizing infrastructure and systems. Candidates should possess solid Technical Support and Troubleshooting skills to diagnose, resolve, and prevent complex IT issues. Candidates should possess expertise in Network Security to implement, monitor, and improve security controls and practices. Extensive experience in leading IT infrastructure projects, including planning, implementation, and migration activities. Proven ability to manage and mentor IT teams, with strong communication and stakeholder management skills. Experience with server and cloud technologies, virtualization, backup and recovery, and IT monitoring tools. Relevant professional certifications (e.g., CompTIA Network+, CCNA, MCSE, or similar) are beneficial. Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent practical experience. Infrastructure & Systems Management · Administer, maintain, and optimize Windows and Linux server environments. · Manage VMware virtualized infrastructure (vSphere 8 and above). · Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. · Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. · Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). · Support endpoint DLP, SIEM, and security monitoring tools (e.g., Splunk, Tenable). · Manage patching processes using ManageEngine Patch Manager Plus. · Support Microsoft 365 services and related cloud technologies. · In depth understanding of Cyber security · Monitor system performance, capacity, availability, and infrastructure health. · Ensure compliance with IT governance, security policies, and operational standards. End-User Computing & Branch Support · Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. · Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. · Manage OS deployment, imaging, image creation, maintenance, and software packaging. · Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. · Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. · Resolve technical incidents and service requests in line with agreed SLAs. Enterprise Applications & Financial Systems Support · Support and administer business-critical applications, including: · Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP · Support enterprise file synchronization and replication solutions (e.g., Syncovery, other SFTP). Networking • Configure and support Cisco switches and routers. • Administer FortiGate firewall environments. • Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management · Support vulnerability management using tools such as Tenable. · Manage security monitoring and log analysis tools (e.g., Splunk). · Perform SSL/TLS certificate lifecycle management using OpenSSL. · Create and manage CSRs, certificate chains, and private keys. · Ensure adherence to cybersecurity policies, standards, and regulatory requirements. · Support physical access control systems (e.g., Paxton) Operating Systems · Windows 11 · Windows Server 2019/2022 (or equivalent enterprise environments) · Red Hat Linux Infrastructure & Virtualization · VMware vSphere / vCenter (v8.0.3 and above) · Veeam Backup & Replication · Veeam ONE, VRO · Microsoft Office 365 · ManageEngine Patch Manager Plus · SAAS solutions · SQL Server Security · Symantec Endpoint Protection (SEP) · Symantec Endpoint Encryption (SEE) · SentinelOne – EDR/ XDR · Endpoint DLP solutions · Firewall administration · Vulnerability management tools (e.g., Tenable) · SIEM tools (e.g., Splunk) Networking · Cisco Switches and Routers · FortiGate Firewalls · LAN/WAN networking and routing Hardware & Storage · Dell PowerEdge Servers · Dell PowerVault SAN Storage Education Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) The role is based in Central London and initially will be be 5 days per week in the office. This is a 12 month FTC position. The salary for the role will be circa £70K - £75K. Do send your CV to us in Word format along with your salary and availability.
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Offre premium
CDD

Offre d'emploiSenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Publiée le
Active Directory Domain Services (AD DS)
Cisco
Microsoft Windows

12 mois
£70k-75k
Cité de Westminster, Royaume-Uni
Senior IT Infrastructure & Systems Lead Our Client a bank, in Central London are looking for an experienced IT Infrastructure professional who is ideally looking for their next challenge in a dynamic and regulated financial services environment. We are seeking a highly skilled Senior IT Infrastructure Officer to lead the management, security, and continuous improvement of our enterprise IT infrastructure. The Senior IT Infrastructure Officer will be playing a key role in ensuring the availability, resilience, and performance of critical systems while supporting technologies across servers, networks, cloud services, cybersecurity, and business-critical financial applications. The candidate must have strong technical expertise in Windows/Linux, VMware, Microsoft 365, networking, cybersecurity, and infrastructure management who also enjoys solving complex challenges and driving operational excellence. Must have 7 years' experience in enterprise infrastructure, ideally within banking or financial services, and be passionate about delivering secure, reliable IT services.. The role will be Monday to Friday, 9:30am to 5:30pm and reporting into the Head of IT & Data. Due to the nature of the role, the individual is expected to work in our offices, 5 days per week, during their probationary period This role is totally hands-on. Role Description The Senior IT Infrastructure & Systems Lead is a full-time hybrid role based in London, with flexibility for some work-from-home arrangements. This role is responsible for overseeing the day-to-day operation, maintenance, and improvement of the company's IT infrastructure, including networks, servers, and core systems. The person in this role will lead and mentor technical staff, manage system performance and availability, and coordinate responses to incidents and service requests. Typical tasks include monitoring network and system health, implementing security measures, resolving technical complex issues, planning upgrades, and collaborating with stakeholders to align technology solutions with business needs. The role also involves vendor management, documentation of infrastructure and procedures, and contributing to IT strategy and roadmap decisions. Qualifications · Candidates should possess strong skills in Network Administration and Information Technology for managing and optimizing infrastructure and systems. · Candidates should possess solid Technical Support and Troubleshooting skills to diagnose, resolve, and prevent complex IT issues. · Candidates should possess expertise in Network Security to implement, monitor, and improve security controls and practices. · Extensive experience in leading IT infrastructure projects, including planning, implementation, and migration activities. · Proven ability to manage and mentor IT teams, with strong communication and stakeholder management skills. · Experience with server and cloud technologies, virtualization, backup and recovery, and IT monitoring tools. · Relevant professional certifications (eg, CompTIA Network+, CCNA, MCSE, or similar) are beneficial. · Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent practical experience. Infrastructure & Systems Management · Administer, maintain, and optimize Windows and Linux server environments. · Manage VMware virtualized infrastructure (vSphere 8 and above). · Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. · Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. · Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). · Support endpoint DLP, SIEM, and security monitoring tools (eg, Splunk, Tenable). · Manage patching processes using ManageEngine Patch Manager Plus. · Support Microsoft 365 services and related cloud technologies. · In depth understanding of Cyber ​​security · Monitor system performance, capacity, availability, and infrastructure health. · Ensure compliance with IT governance, security policies, and operational standards. End-User Computing & Branch Support · Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. · Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. · Manage OS deployment, imaging, image creation, maintenance, and software packaging. · Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. · Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. · Resolve technical incidents and service requests in line with agreed SLAs. Enterprise Applications & Financial Systems Support · Support and administer business-critical applications, including: · Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP · Support enterprise file synchronization and replication solutions (eg, Syncovery, other SFTP). Networking • Configure and support Cisco switches and routers. • Administer FortiGate firewall environments. • Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management · Support vulnerability management using tools such as Tenable. · Manage security monitoring and log analysis tools (eg, Splunk). · Perform SSL/TLS certificate lifecycle management using OpenSSL. · Create and manage CSRs, certificate chains, and private keys. · Ensure adherence to cybersecurity policies, standards, and regulatory requirements. · Support physical access control systems (eg, Paxton) Operating Systems · Windows 11 · Windows Server 2019/2022 (or equivalent enterprise environments) Red Hat Linux Infrastructure & Virtualization · VMware vSphere / vCenter (v8.0.3 and above) Veeam Backup & Replication Veeam ONE, VRO Microsoft Office 365 · ManageEngine Patch Manager Plus SaaS solutions SQL Server Security · Symantec Endpoint Protection (SEP) · Symantec Endpoint Encryption (SEE) SentinelOne – EDR/XDR Endpoint DLP solutions Firewall administration · Vulnerability management tools (eg, Tenable) SIEM tools (e.g., Splunk) Networking Cisco Switches and Routers · FortiGate Firewalls · LAN/WAN networking and routing Hardware & Storage Dell PowerEdge Servers · Dell PowerVault SAN Storage Education Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) The role is based in Central London and initially will be 5 days per week in the office. This is a 12 month FTC position. The salary for the role will be around £70K - £75K. Do send your CV to us in Word format along with your salary and availability.
Voir cette offre
Offre premium
CDI

Offre d'emploiSenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Publiée le
Administration Windows
Center for Internet Security (CIS)
LAN

£70k-75k
Cité de Westminster, Royaume-Uni
Senior IT Infrastructure & Systems Lead Our Client a bank, in Central London are looking for an experienced IT Infrastructure professional who is ideally looking for their next challenge in a dynamic and regulated financial services environment. We are seeking a highly skilled Senior IT Infrastructure Officer to lead the management, security, and continuous improvement of our enterprise IT infrastructure. The Senior IT Infrastructure Officer will be playing a key role in ensuring the availability, resilience, and performance of critical systems while supporting technologies across servers, networks, cloud services, cybersecurity, and business-critical financial applications. The candidate must have strong technical expertise in Windows/Linux, VMware, Microsoft 365, networking, cybersecurity, and infrastructure management who also enjoys solving complex challenges and driving operational excellence. Must have 7 years' experience in enterprise infrastructure, ideally within banking or financial services, and be passionate about delivering secure, reliable IT services.. The role will be Monday to Friday, 9:30am to 5:30pm and reporting into the Head of IT & Data. Due to the nature of the role, the individual is expected to work in our offices, 5 days per week, during their probationary period This role is totally hands-on. Role Description The Senior IT Infrastructure & Systems Lead is a full-time hybrid role based in London, with flexibility for some work-from-home arrangements. This role is responsible for overseeing the day-to-day operation, maintenance, and improvement of the company's IT infrastructure, including networks, servers, and core systems. The person in this role will lead and mentor technical staff, manage system performance and availability, and coordinate responses to incidents and service requests. Typical tasks include monitoring network and system health, implementing security measures, resolving technical complex issues, planning upgrades, and collaborating with stakeholders to align technology solutions with business needs. The role also involves vendor management, documentation of infrastructure and procedures, and contributing to IT strategy and roadmap decisions. Qualifications · Candidates should possess strong skills in Network Administration and Information Technology for managing and optimizing infrastructure and systems. · Candidates should possess solid Technical Support and Troubleshooting skills to diagnose, resolve, and prevent complex IT issues. · Candidates should possess expertise in Network Security to implement, monitor, and improve security controls and practices. · Extensive experience in leading IT infrastructure projects, including planning, implementation, and migration activities. · Proven ability to manage and mentor IT teams, with strong communication and stakeholder management skills. · Experience with server and cloud technologies, virtualization, backup and recovery, and IT monitoring tools. · Relevant professional certifications (eg, CompTIA Network+, CCNA, MCSE, or similar) are beneficial. · Bachelor's degree in Information Technology, Computer Science, or a related field, or equivalent practical experience. Infrastructure & Systems Management · Administer, maintain, and optimize Windows and Linux server environments. · Manage VMware virtualized infrastructure (vSphere 8 and above). · Oversee enterprise backup and disaster recovery solutions using Veeam Backup & Replication. · Manage Veeam ONE monitoring and Veeam Recovery Orchestrator (VRO) environments. · Administer endpoint security and encryption solutions, including Symantec Endpoint Protection (SEP) and Symantec Endpoint Encryption (SEE). · Support endpoint DLP, SIEM, and security monitoring tools (eg, Splunk, Tenable). · Manage patching processes using ManageEngine Patch Manager Plus. · Support Microsoft 365 services and related cloud technologies. · In depth understanding of Cyber ​​security · Monitor system performance, capacity, availability, and infrastructure health. · Ensure compliance with IT governance, security policies, and operational standards. End-User Computing & Branch Support · Provide advanced desktop, laptop, printer, Mobile device (iOS) and branch office IT support. · Deliver AV support for meeting rooms, conferencing, presentations, and collaboration systems. · Manage OS deployment, imaging, image creation, maintenance, and software packaging. · Administer Active Directory (AD), Group Policy Objects (GPOs) and user provisioning and NTFS permissions. · Support Microsoft 365 applications including Outlook, Teams, OneDrive, and SharePoint. · Resolve technical incidents and service requests in line with agreed SLAs. Enterprise Applications & Financial Systems Support · Support and administer business-critical applications, including: · Bloomberg FXT and Refinitiv Eikon, Murex Treasury System, SWIFT Alliance Access (SAA), 1AML, SIBS, GFMS, COP · Support enterprise file synchronization and replication solutions (eg, Syncovery, other SFTP). Networking • Configure and support Cisco switches and routers. • Administer FortiGate firewall environments. • Strong network fundamentals: DNS, DHCP, TCP/IP, LAN/WAN, Routing and connectivity troubleshooting. Monitor network performance, availability, and security posture. Security & Endpoint Management · Support vulnerability management using tools such as Tenable. · Manage security monitoring and log analysis tools (eg, Splunk). · Perform SSL/TLS certificate lifecycle management using OpenSSL. · Create and manage CSRs, certificate chains, and private keys. · Ensure adherence to cybersecurity policies, standards, and regulatory requirements. · Support physical access control systems (eg, Paxton) Operating Systems · Windows 11 · Windows Server 2019/2022 (or equivalent enterprise environments) Red Hat Linux Infrastructure & Virtualization · VMware vSphere / vCenter (v8.0.3 and above) Veeam Backup & Replication Veeam ONE, VRO Microsoft Office 365 · ManageEngine Patch Manager Plus SaaS solutions SQL Server Security · Symantec Endpoint Protection (SEP) · Symantec Endpoint Encryption (SEE) SentinelOne – EDR/XDR Endpoint DLP solutions Firewall administration · Vulnerability management tools (eg, Tenable) SIEM tools (e.g., Splunk) Networking Cisco Switches and Routers · FortiGate Firewalls · LAN/WAN networking and routing Hardware & Storage Dell PowerEdge Servers · Dell PowerVault SAN Storage Education Bachelor or Master's degree or professional qualification in relevant discipline (IT/Information Systems/Computer Science/Technology/Programming/Information Science/System Engineering/Computing) The role is based in Central London and initially will be 5 days per week in the office. This is a 12 month FTC position. The salary for the role will be around £70K - £75K. Do send your CV to us in Word format along with your salary and availability.
Voir cette offre

Les métiers et les missions en freelance pour DHCP (Dynamic Host Configuration Protocol)

Administrateur·rice réseaux

L'Administrateur·rice réseaux configure et maintient les serveurs DHCP pour automatiser l’attribution des adresses IP dans les réseaux, assurant leur bon fonctionnement et leur scalabilité.

Ingénieur·e systèmes & réseaux

L'Ingénieur·e systèmes & réseaux implémente et optimise les services DHCP dans les infrastructures réseau, en veillant à la compatibilité avec d'autres protocoles réseau comme DNS et NAT.

Responsable systèmes et réseaux

Le/ La Responsable systèmes et réseaux supervise les infrastructures réseau, y compris la gestion des services DHCP pour garantir une connectivité fluide et fiable.

Technicien·ne réseau

Le/ La Technicien·ne réseau gère la configuration et le dépannage des serveurs DHCP pour résoudre rapidement les problèmes liés à l’adressage IP dans les réseaux locaux.

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