Senior Network Engineer (DV Cleared) Hertfordshire (On-site) Up to £60K + Benefits Active DV Clearance Required DV Cleared Network Engineer? Ready for a more meaningful challenge? Join a mission-critical defence programme delivering a secure, ground-up network across complex, multi-site environments. This is a hands-on role where you’ll work at L2/L3 level, supporting and enhancing highly secure infrastructure that genuinely matters. In this Senior Network Engineer role you will: Provide L2/L3 network support across a complex environment Configure and maintain Cisco routing & switching Manage Fortinet firewalls (policies, VPNs, security changes) Support F5 load balancing / application delivery Deliver network changes, upgrades, and deployments Maintain technical documentation and support projects To Secure this role you will have worked in a Senior Network role and have: Strong Cisco networking (routing & switching) experience Experience with firewalls (Cisco / Fortinet) Background in secure, enterprise environments Solid troubleshooting and incident resolution skills F5 / load balancing experience Cisco certifications (CCNA / CCNP) Exposure to network security / DDoS protection Why this Senior Network role? Work on secure, nationally significant systems Complex, large-scale network environment Real technical ownership and impactIf you hold active DV clearance, apply now or get in touch...