Find your next tech and IT Job or contract Network administration

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.

Vous administrez l'infrastructure réseau SDN d'une grande collectivité publique parisienne, bâtie sur la technologie Cisco ACI : environ 100 commutateurs Nexus 9K (leafs et spines), 90% installés sur le site principal de Paris. Vous êtes le référent unique sur ce périmètre et membre de droit du comité de pilotage du marché. Astreintes : 1 semaine sur 4, du vendredi 12h au vendredi suivant (environ 12 semaines/an). • Administration courante de la fabric Cisco ACI : tenants, profils d'application, contracts, filters • Gestion des incidents de niveau 2 et 3 sur l'infrastructure réseau • Pilotage des évolutions : déploiement de nouvelles architectures logiques, interconnectivité Multi-Pod et Multi-Site • Cycles de vie : campagnes de mise à jour des contrôleurs APIC (software) et des commutateurs Leafs et Spines (firmware) • Sécurisation et durcissement des configurations • Création, modification, suppression de paramétrages de port • Participation aux tests de bascule du Plan de Reprise d'Activité (PRA) • Astreinte HNO (vendredi 12h au vendredi 12h suivant) avec interventions à distance ou sur site • Formation croisée du Référent N3 sur les bases Cisco ACI (pour le backup astreinte) • Documentation technique et transfert de compétences vers l'équipe du client