Salary: £36,000 - 42,000 per year Requirements: Hands-on experience with Fortinet Firewalls Experience using Fortinet Analyzer Knowledge of HPE Switches Familiarity with BOWMAN communication systems Understanding of network fundamentals (routing, switching, security principles) Active MOD SC Clearance (essential) Must be a UK National Ideally based in or near Portsmouth Available to start immediately Experience with VMware environments (desirable) Responsibilities: Support the configuration, maintenance, and troubleshooting of network infrastructure Work with secure systems in line with MOD standards and procedures Assist in firewall and network monitoring activities Participate in planned network changes, upgrades, and weekend exercises where required Provide support during shift rotations as needed Collaborate with senior engineers and wider technical teams Technologies: Firewall Support Network Security VMware More: We are seeking a Junior Network Engineer to join a project based in Portsmouth, supporting network infrastructure operations within a secure environment. This is an on-site role requiring immediate availability, with the potential for extension beyond the initial contract period. Our working pattern is Monday to Friday, with occasional weekend work and shift-based support required. This role is suited to a junior-level engineer looking to gain experience in a secure, high-impact environment while working with leading networking technologies. last updated 21 week of 2026