Lead Network Engineer – Defence (DV Eligible, On‑Site)

Sopra Steria Limited; Rushmoor; On-site; GBP 59,000 - 72,000; Full time

Benefits offered by this job

Car allowance

25 days annual leave

Private medical

Life assurance

Pension

Flexible benefits fund

Job summary

Sopra Steria Limited in Farnborough is seeking an experienced Lead Network Engineer to deliver expert L2/L3 support for a complex enterprise network within highly secure environments. You will configure Cisco routing/switching, Firepower firewalls, Fortinet devices, and F5 load-balancing while following robust change control and security standards.

The role includes site deployments, documentation updates, and collaboration across teams.

Qualifications

• Strong knowledge of Cisco routing and switching.
• Experience with Cisco firewalls, including Firepower.
• Experience with Fortinet technologies.
• Exposure to F5 and wider network security / DDoS-related tooling.

Responsibilities

• Deliver expert L2/L3 support for a complex, multi-site enterprise network, resolving incidents and minimising service disruption.
• Configure and maintain Cisco network infrastructure, including switches, routers, and core connectivity services.
• Support and optimise F5 application delivery and load balancing platforms to ensure availability, performance, and resilience.
• Administer Fortinet firewalls and security services, including policy management, VPN configuration, and security compliance changes.
• Execute planned network changes, upgrades, and site deployments while adhering to change control and security standards.
• Update LLDs, technical documentation, and operational procedures, while supporting wider project delivery and continuous improvement activities.

Skills

Cisco routing

Cisco switching

Cisco Firepower

Fortinet

F5

Job description

Sopra Steria Limited in Farnborough is seeking an experienced Lead Network Engineer to deliver expert L2/L3 support for a complex enterprise network within highly secure environments. You will configure Cisco routing/switching, Firepower firewalls, Fortinet devices, and F5 load-balancing while following robust change control and security standards.

The role includes site deployments, documentation updates, and collaboration across teams.