Senior Network Engineer

Base pay range

Thorn SDS is a specialist Managed Service Provider based in Alton, Hampshire. We empower technology professionals and organisations across the Space, Defence, and Security sectors. We’re growing our team with a Senior Network Engineer who’s ready to make an impact.

Full-time, on-site role (5 days per week) at a secure location in Hereford. Operating at SFIA Level 5, shaping and supporting mission‑critical network infrastructure in highly specialised environments.

Security Clearance – Must hold or be eligible to obtain a high level of National Security Clearance. Some UK travel with overnight stays may be required.

What You’ll Be Doing

• Configuring and managing routers, switches, and routing protocols
• Designing VLANs, network segmentation, and virtualised network environments
• Delivering cloud networking solutions and network automation
• Producing detailed network designs, configurations, and performance reports
• Monitoring and improving network performance with the right tools and processes
• Troubleshooting implementation issues and supporting end users in test environments
• Deploying infrastructure through later delivery phases
• Contributing to PI (Program Increment) planning and cross-functional collaboration
• Guiding and enabling others to deliver results, with scope to supervise or mentor

What You’ll Bring

• Proven experience as a Senior Network Engineer
• Strong capability across Routing & Switching, Network Security, Monitoring & Management, Network Virtualisation, Cloud Networking, Network Automation
• Excellent troubleshooting skills and the ability to untangle complex issues
• Certifications such as CCNA / CCNP (or equivalent) are a bonus
• Strong communicator and collaborator
• Analytical mindset with attention to detail
• Comfortable adapting to evolving technologies and industry trends

What’s In It For You

• 25 days Annual Leave (plus Bank Holidays)
• Employer Pension Contributions
• Group Life Insurance
• Dental Cashback Plan
• Health Cashback Plan
• Wellbeing Services (includes GP, Physio and Savings Benefits)
• Thorn Wellbeing Support Contribution
• Cycle to Work Scheme
• Supported Training & Personal Development Opportunities

All applicants must have the Right to Work in the UK.

Ready to Take the Lead?

If you’re looking to push your career forward in a high‑stakes, fast‑moving environment, we’d love to hear from you. Join Thorn SDS and become a key player in delivering secure, reliable network solutions where they matter most.

Apply now and shape the future of secure networking.