Find your next tech and IT Job or contract Network Administrator

A network administrator is in charge of implementing and monitoring network flows within an infrastructure. They ensure the proper functioning of telecommunications systems that allow different sites and offices of a company to exchange information. They must guarantee computer data exchange as quickly as possible. The network administrator receives and installs IT and telecom equipment while ensuring their compatibility. They intervene in case of technical problems and report malfunctions to the telecom and network engineer. Given the development of networks, new perspectives are opening up for this profession.

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Contractor

Contractor jobNetwork Administrator - DV Cleared

LA International Computer Consultants Ltd
Published on

6 months
£500
Bristol, United Kingdom
Network Administrator Must have an Active DV Clearance Network Administrator Overview Join a small, experienced team responsible for supporting secure network infrastructure within a highly secure operational environment. This role offers the opportunity to deliver network administration, service provisioning, technical support, and operational maintenance across critical services. You will work closely with Service Management teams, customer stakeholders, and Managed Service Providers to ensure reliable, secure, and efficient network operations. The position is ideal for an experienced Network Administrator with strong Juniper networking expertise and a solid understanding of ITIL service management. Network Administrator Responsibilities Monitor network performance and report on the health of network services. Process customer service requests and support the delivery of new network services. Create, deploy, and maintain network configurations. Liaise with Service Management teams and customer representatives to deliver operational services. Provide technical support to Managed Service Providers. Maintain accurate network diagrams and technical documentation. Support annual Crypto Key Fill activities. Update and maintain the Configuration Management Database (CMDB). Participate in an out-of-hours technical support rota on a one week in four basis. Network Administrator Skills and Experience Strong experience administering Juniper network devices. Experience supporting Juniper firewall technologies. Good understanding of ITIL Incident, Problem, and Change Management processes. Experience working with network encryption technologies. Strong troubleshooting and problem-solving skills. Experience supporting secure or highly regulated environments. Understanding of handling sensitive or classified material desirable. Willingness to travel to customer locations when required. To apply, please send your CV by pressing the apply button. Due to high volume of applications, only shortlisted CVs will be contacted. Due to the nature and urgency of this post, candidates holding or who have held high level security clearance in the past are most welcome to apply. Please note successful applicants will be required to be security cleared prior to appointment which can take a minimum 18 weeks. LA International is an award-winning partner of choice for many of the world's most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance. An award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over multiple years. We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported. We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience. Please Note: If a high volume of applications is received, only candidates shortlisted will be contacted.
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Contractor

Contractor jobIngénieur Systèmes & Réseaux (H/F)

SCC France SAS
Published on
Network administration
System administration
System and network administration

6 months
280-430 €
Figeac, Occitania
🌍SCC est la division « technologie » du Groupe Rigby. Premier groupe informatique privé en Europe, un acteur majeur de l'intégration et des services informatiques d'infrastructure. L'ambition de SCC est de fournir à ses clients des solutions technologiques et des services intégrés pour assurer l'efficacité financière et opérationnelle de leur outil informatique et supporter leur compétitivité. Partenaire incontournable, SCC répond à l'ensemble des besoins clients, des plus simples aux plus complexes, grâce à l'étendue de son offre et de sa couverture géographique, son expertise tant généraliste que spécialisée et la portée de ses centres de service. 🤝SCC est avant tout une aventure humaine. Ses collaborateurs sont sa principale richesse. Ensemble, ils sont réunis autour de cinq valeurs d'entreprise : l'esprit d'entreprendre, le professionnalisme, l'esprit d'équipe, l'engagement et les diversités. Chez SCC, nous valorisons la diversité et l'inclusion. Chaque talent compte, indépendamment du genre, du handicap ou de toute autre distinction. Présente sur tout le territoire national, SCC compte plus de 5 000 clients, 3 500 collaborateurs et d'un chiffre d'affaires de 3 Milliards d'EUR en France au 31/03/2025. Le poste ➡️ Mission principale En tant qu'Ingénieur Systèmes & Réseaux, vous intervenez sur la conception, le déploiement et l'administration des infrastructures informatiques. Vous êtes garant(e) de la performance, de la sécurité et de la disponibilité des systèmes d'information. ➡️ Responsabilités Concevoir, déployer et administrer les infrastructures systèmes et réseaux Assurer la sécurité, la disponibilité et la performance du SI Superviser, maintenir et faire évoluer les équipements et services - Diagnostiquer et gérer les incidents techniques Piloter des projets d'infrastructures et accompagner leur mise en œuvre Assurer le support et accompagner les utilisateurs dans leurs problématiques techniques Participer à l'amélioration continue des environnements et des processus ➡️ Environnement technique Réseaux : protocoles TCP/IP, architectures réseaux Systèmes : Windows & Linux Virtualisation & architecture SI - Sécurité des systèmes d'information Outils d'administration et de supervision Sauvegardes, automatisation et optimisation des performances
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Contractor
Permanent

Job VacancyRéférent technique - Techlead - Responsable Systèmes - Modern Workplace

CAPEST conseils
Published on
microsoft
System and network administration
Workplace

3 months
Nantes, Pays de la Loire
Notre client cherche à embaucher en CDI. Préembauche possible. A POURVOIR SUR NANTES Modern Workplace ContexteLa DSI recherche un Référent Technique Environnement de Travail pour rejoindre son équipe Systèmes, en charge des environnements Microsoft et des services utilisateurs : postes de travail, messagerie, outils collaboratifs, impressions et services associés. Le poste s'exerce en lien étroit avec l'infogérant support. Finalité du posteLe Référent Technique Environnement de Travail assure l'expertise technique, l'administration, le support de niveau 3 et l'évolution du périmètre environnement de travail. Il contribue également au maintien en conditions opérationnelles et de sécurité, ainsi qu'aux projets de transformation dans une stratégie de Move-to-Cloud. Missions principalesAnimer techniquement l'équipe Systèmes sur le périmètre environnement de travail. Administrer et maintenir les outils de gestion des postes de travail : masterisation, télédistribution, télé-inventaire, prise de main à distance, chiffrement des disques. Administrer et maintenir les services Microsoft On Premise et Cloud : Exchange, SharePoint, Active Directory, Azure, Microsoft 365, Microsoft Entra ID. Assurer le support de niveau 3 auprès des utilisateurs, dans le respect des engagements de service de la DSI. Accompagner les utilisateurs dans l'usage des outils mis à leur disposition. Former et informer les équipes d'infogérance : support niveau 1, administration et exploitation niveau 2. Contribuer au maintien en conditions de sécurité : correctifs de sécurité, gestion des vulnérabilités, paramètres de sécurité On Premise et Cloud. Participer aux projets d'évolution du périmètre environnement de travail, notamment dans le cadre du Move-to-Cloud. Profil recherchéIssu(e) d'une formation supérieure en ingénierie ou informatique, vous justifiez d'une expérience significative sur des fonctions similaires, idéalement dans un contexte de transformation. Une première expérience en management d'équipe et/ou en gestion de projets est attendue. Compétences attenduesExpertise sur l'architecture et la configuration des postes de travail : matériels, logiciels, Windows 11. Expertise sur les outils d'administration des postes de travail, idéalement Microsoft Deployment Toolkit et Microsoft Intune. Expertise sur les outils de sécurité des systèmes : XDR, firewalls locaux. Maîtrise des services Microsoft On Premise : Windows Server, SQL Server, Exchange, SharePoint, Active Directory, WSUS, DNS/DHCP, RDS. Maîtrise de VMware vSphere. Expérience pratique de l'administration des services Cloud Microsoft : Microsoft 365, Microsoft Entra ID. Capacité à animer techniquement une équipe et à travailler avec un infogérant. Sens du service, rigueur, capacité à traiter des incidents complexes et à transmettre les bonnes pratiques. Environnement techniqueWindows 11 Microsoft Deployment Toolkit Microsoft Intune XDR Firewalls locaux Windows Server SQL Server Exchange SharePoint Active Directory WSUS DNS/DHCP RDS VMware vSphere Azure Microsoft 365 Microsoft Entra ID
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Contractor

Contractor jobAdministrateur système et infra (Lille / Pas de FTT)

ESENCA
Published on
Docker
Git
Linux administration

1 year
Lille, Hauts-de-France
Mission principale Assurer le maintien en conditions opérationnelles, l'administration et l'évolution des infrastructures systèmes hébergeant les services internes et clients, avec une forte dominante Linux et une activité principalement orientée exploitation (RUN). Activités principales Administration systèmes Administrer et maintenir les environnements Linux et Windows Server. Gérer les comptes, droits d'accès et configurations systèmes. Assurer les mises à jour, correctifs et opérations de maintenance. Garantir la disponibilité et la performance des infrastructures. Exploitation et support (RUN) Superviser les plateformes et traiter les alertes. Diagnostiquer et résoudre les incidents N2/N3. Assurer le suivi des problèmes jusqu'à leur résolution. Participer à la gestion des changements et des mises en production. Réaliser les analyses post-incident et proposer des actions correctives. Conteneurisation et plateformes Administrer les environnements Docker et/ou Podman. Maintenir les conteneurs applicatifs et leurs configurations. Participer à l'industrialisation et à l'optimisation des déploiements. Automatisation et gestion de configuration Développer et maintenir des scripts d'exploitation. Participer à l'automatisation des tâches récurrentes. Contribuer à l'amélioration continue des procédures d'exploitation. Documentation et collaboration Maintenir la documentation technique. Participer aux revues de changements et aux échanges avec les équipes projets. Assurer le partage de connaissances au sein de l'équipe. Environnement technique Systèmes Linux (Debian, Ubuntu, Red Hat) Windows Server Conteneurisation Docker Podman Gestion de versions Git GitLab Virtualisation VMware (apprécié) Réseau TCP/IP DNS DHCP VLAN VPN Scripting Bash PowerShell Python (apprécié) Supervision Centreon, Zabbix ou équivalent
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Contractor
Permanent
Fixed term

Job VacancyAdministrateur réseaux et Sécurité

EDC DIGITAL-IT
Published on
Cisco Meraki
Cybersecurity
Network administration

1 year
40k-45k €
350-450 €
Hauts-de-Seine, France
Contexte : Au sein de l'équipe réseau, l'administrateur(trice) Réseaux et Sécurité viendra renforcer l'équipe pour absorber la charge de RUN et mener des opérations de déploiement visant à faire évoluer nos infrastructures et notre sécurité informatique. Ses principales missions seront les suivantes : Support & RUN Traiter les tickets transmis par l'infogérant. Réduire le volume de tickets en rendant l'infogérant et les correspondants IT plus autonomes : Création et mise à jour de documentations / bases de connaissances ; Animation de sessions de formation ou de transferts de compétences. Évolutions et projets Migration du Wi-Fi invité (clé partagée → portail captif) Définir et maintenir la configuration des bornes par site dans Cloud4Wi. Garantir la version minimale du contrôleur Wi-Fi nécessaire au bon fonctionnement du portail. Activation du NAC sur des sites en production Organiser et piloter les phases d'audit, de remédiation et d'activation. Travailler sur les solutions Cisco Catalyst et Cisco ISE. Est amené à travailler directement avec : Les ingénieurs réseaux et sécurité de l'équipe. Les équipes DESIGN et BUILD. Les équipes en charge du RUN et le MSP. Les équipes régionales de la DSI. Les domaines applicatifs. L'équipe SSI. L'équipe Programme Cloud. Les fournisseurs de solutions réseaux. Compétences techniques attendues Switching: Cisco Catalyst 9200/9500, Nexus 9300, Meraki MS ; VTP, Spanning Tree, VPC, LACP, VLAN. Routing: Cisco Catalyst SD-WAN, Meraki SD-WAN ; BGP, OSPF. Wireless: Cisco C9800-CL, CW9172I, C9120AXI, AIR-AP2802I, Meraki MR ; RRM. Sécurité: Firewalls Cisco ASA, Palo Alto, Umbrella ; Radius/Tacacs (Cisco ISE). Load Balancing & Proxy: F5. Outils: Catalyst Center, LiveNX. Services: DNS, NTP, DHCP. Qualités personnelles Compréhension des enjeux métiers et orientation client. Sensibilité forte aux enjeux de cybersécurité. Aisance rédactionnelle. Capacité à challenger l'existant et à proposer des améliorations. Travail en équipe. Anglais opérationnel (lu, écrit, parlé). Serait un plus Connaissance en Cisco ACI Expérience en automatisation (Azure DevOps, Network As Code, Terraform) Connaissance de Tufin
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Premium Job
Fixed term

Job VacancySenior IT Infrastructure & Systems Lead

Nexus Jobs Limited
Published on
Active Directory Domain Services (AD DS)
Cisco
Microsoft Windows

12 months
£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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Frequently asked questions about working as a Network Administrator

What is the role of a Network Administrator

As the guarantor of a company's computer network's proper functioning, the network administrator's objective is to perform regular maintenance on a company's computer network. Additionally, they are responsible for any problems that may occur on the network and must resolve them as quickly as possible. Users experiencing network access issues can turn to this professional working within the IT department for assistance.

How much does a Network Administrator charge

The average daily rate for a network administrator amounts to £400. The salary of a network administrator amounts to, on average, £30K per year.

What is the definition of a Network Administrator

A network administrator is a professional in the IT sector who will handle the implementation and maintenance of the computer network within a company. Their goal will be to ensure that the technologies used are optimal. They must handle the installation of new devices, but also manage network access for users.

What type of mission can a Network Administrator handle

A network administrator will mainly have four major activities. Generally, they will handle the implementation as well as the management of a company's computer network. They will then need to acquire hardware, software and ensure their proper installation. They will also be in charge of network administration, which means they will manage security standards as well as access to different networks. They will occasionally focus on the network operating budget, as well as network performance monitoring dashboards. The network administrator's goal will be to help users who encounter problems on the network or on workstations. They will intervene in case of failure, and this, as quickly as possible to allow users to access data present on the network. Finally, they must be able to perform technology watch to anticipate any modifications needed on the network so that it remains operational and efficient.

What are the main skills of a Network Administrator

A network administrator has many skills and is notably considered an expert when it comes to network and system administration. A company's computer system holds no secrets from them and they know communication protocols perfectly. Regarding communication technologies, they master most of them to enable their proper installation within the company's premises. With Windows and Unix being the main operating systems, a network administrator must know them well. Such a professional, whether working freelance or not, must master technical English to best manage the implementation of the network within the company.

What is the ideal profile for a Network Administrator

There is no typical profile for a network administrator, but they must still possess certain qualities. They must, for example, be able to listen and communicate easily with others, as users may come to them for various clarifications. It is imperative to be attentive and responsive, since this profession requires managing sometimes up to several hundred computer workstations. Moreover, in case of technical failure, a network administrator must know how to keep calm in order to resolve various problems as quickly as possible. It is also noted that patience and curiosity are two important qualities insofar as some problems may take time to be resolved. It also remains necessary to be curious since technologies evolve rapidly, a network administrator must be able to update the network or order new equipment as quickly as possible. The ability to quickly understand how new technologies work is also not negligible.

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