Salary: £117,000 - 126,000 per year Requirements: Active DV clearance required Strong knowledge of data centre and campus networking technologies Hands-on experience with Cisco routing, switching, and firewalls Experience with Fortinet (Fortigate / FortiSwitch), Palo Alto firewalls, and Juniper SRX Experience working with F5 load balancing technologies (global and local) VMware NSX experience Strong knowledge of routing protocols and L2/L3 networking Experience supporting high availability data centre networks Experience working in Defence or highly secure environments Strong troubleshooting and analytical skills with ownership of complex incidents Experience producing technical documentation and working within structured delivery environments Responsibilities: Producing network designs and providing engineering expertise within delivery teams Designing and implementing modern, scalable network solutions across secure environments Supporting both project delivery and operational (BAU) network services Leading network management and acceptance activities within the programme Working with partner teams to implement new technologies and automation capabilities Supporting network integration and assurance across multiple business services Producing and maintaining technical documentation including HLDs, LLDs, and work instructions Technologies: Cisco FortiGate Support Load Balancing Network VMware More: We are seeking a DV Cleared Network Engineer to join our team in Farnborough or Twickenham, working onsite in a programme delivering critical infrastructure within a secure Defence environment. This is a minimum 6-month contract with the potential for extension, offering a mix of project delivery and business-as-usual tasks. You will be part of a senior delivery team responsible for network design and operational support across complex enterprise and data centre environments, contributing to mission-critical systems. last updated 12 week of 2026