Salary: £60,000 - 60,000 per year Requirements: 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 Responsibilities: 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 Technologies: Cisco Support Load Balancing Network Security More: We are a leading company in the defense sector, focused on delivering mission-critical solutions that ensure national security. Our team operates in a complex, large-scale network environment where your contributions will make a real impact. We offer a competitive salary of up to £60K along with a comprehensive benefits package. This role is based in Hertfordshire and is hands-on, ideal for those seeking greater responsibility in a rewarding field. last updated 21 week of 2026