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Contractor

Contractor jobNetwork Engineer Expert

LeHibou
Published on
Aruba
BGP (Border Gateway Protocol)
Cisco

6 months
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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Premium Job
Permanent

Job VacancySenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Published on
Center for Internet Security (CIS)
LAN
Office 365

£70k-75k
SW1V 1SW, London, England, United Kingdom
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.
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Permanent

Job VacancyChef de Projet Réseaux & Infrastructures (H/F)

Experis France
Published on

42k-47k €
Saint-Herblain, Pays de la Loire
Chef de Projet Réseaux & Infrastructures (H/F) - Saint-Herblain Contexte Au sein d'une équipe en charge des infrastructures réseaux, vous participez à la conduite de projets stratégiques liés à l'évolution des environnements WAN, LAN et WLAN. Vous assurez la coordination des différentes parties prenantes tout en conservant une proximité avec les sujets techniques et les équipes opérationnelles. Le poste combine pilotage projet, expertise infrastructures réseau et gestion des référentiels techniques dans un contexte multi-sites. Vos missions Pilotage des projets réseaux Piloter les projets d'évolution des infrastructures réseau. Assurer le suivi des plannings, des actions et des risques. Coordonner les équipes techniques, les partenaires et les interlocuteurs métiers. Accompagner les transformations et intégrations de nouveaux sites. Garantir la bonne communication entre les différents acteurs du projet. Gestion des infrastructures Participer à la préparation, la configuration et la mise en service des équipements réseau. Accompagner les déploiements SD-WAN et les évolutions des architectures réseau. Contribuer aux opérations d'intégration, de migration et d'amélioration des infrastructures. Assurer le maintien en condition opérationnelle des environnements administrés. Gestion des référentiels et assets Administrer et maintenir l'inventaire des équipements réseau. Garantir la fiabilité et la cohérence des données entre les différents outils de gestion. Participer à l'amélioration des processus de gestion des actifs et de documentation. Reporting et amélioration continue Définir et suivre les indicateurs de performance. Produire les reportings liés aux projets et aux infrastructures. Contribuer à l'optimisation des outils et méthodes de pilotage. Maintenir une documentation technique et fonctionnelle à jour. Projets à venir Déploiement et transformation de sites stratégiques. Mise en œuvre de l'authentification Microsoft Entra ID. Modernisation des infrastructures WAN. Réalisation de POC autour de nouvelles technologies réseau. Refonte des outils SharePoint liés au suivi des infrastructures. Renouvellement des environnements LAN/WLAN.
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