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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Network Engineer - **Company:** Thorn SDS - **Location:** Corsham, UK (Remote available) - **Experience:** Expert - **Salary:** £68,518.0 - **Contract:** Permanent contract - **Skills:** Complex Networks, Computer Networks, System Configuration, Virtual Private Networks (VPN), Network Troubleshooting, Network Layer, Transport Layer, Network Architecture, Network Monitoring, Routing, Performance Tuning, Remote Access Technology, Mod Security, Network Routers, Computer Networking Systems, Firewalls (Computer Science), Information Technology, Network Optimization, Vmware - **Published:** August 1, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5823025717 ## About the Role You'll be an experienced Network Engineer who enjoys working in technically challenging, enterprise-scale environments. We're particularly interested in candidates with experience in: * Enterprise routing and switching (Layer 2 & Layer 3). * Cisco networking technologies. * Firewalls, VPNs and secure remote connectivity. * VMware NSX or other Software Defined Networking technologies. * Network monitoring, performance optimisation and troubleshooting. * Layer 4 application dependencies and network performance analysis. * Enterprise infrastructure within secure or highly regulated environments. * ITIL service management processes. * Defence, MOD or other security-sensitive environments (desirable). You'll also have excellent analytical, troubleshooting and communication skills and be comfortable working full-time onsite in Corsham., Applicants must have the right to work in the UK and either already hold, or be eligible to obtain, a high level of UK National Security Clearance. ## Description Are you an experienced Network Engineer looking for a role where your expertise has a genuine operational impact? We're looking for a Senior Network Engineer to join a nationally significant UK Defence programme, supporting the secure, resilient network infrastructure that enables mission-critical operations across the UK and overseas. Working in one of the UK's most secure IT environments, you'll design, maintain and optimise enterprise network infrastructure while helping deliver the next generation of deployable IT services for the Ministry of Defence. If you thrive on solving complex networking challenges and want to work with cutting-edge technologies in an environment where reliability and security are paramount, we'd love to hear from you., As a Senior Network Engineer, you'll provide advanced 2nd and 3rd line support across enterprise network infrastructure, ensuring the availability, performance and security of critical operational services. Working alongside Service Operations, Resolver Groups and specialist engineering teams, you'll troubleshoot complex network issues, implement infrastructure improvements and support secure deployments across both fixed and deployable environments. This is an excellent opportunity for an experienced engineer who enjoys working with enterprise networking technologies in highly secure, mission-critical environments. What You'll Be Doing * Supporting and maintaining enterprise LAN, WAN and operational network infrastructure. * Configuring, managing and troubleshooting routers, switches, firewalls and VPN technologies. * Investigating and resolving complex Layer 2, Layer 3 and Layer 4 networking issues. * Supporting Software Defined Networking technologies, including VMware NSX. * Monitoring network performance, capacity and availability to ensure optimum service delivery. * Implementing network upgrades, changes and security improvements. * Supporting ITIL-aligned incident, problem and change management processes. * Working closely with infrastructure, applications and security teams to resolve technical issues. * Supporting deployments across both on-premises and operational environments. * Maintaining network resilience while ensuring compliance with MOD security policies and standards. ## Related Videos - [WeAreDevelopers LIVE - "Fun and games - and all that comes with it", Back to BASIC & more](https://www.wearedevelopers.com/videos/1719-wearedevelopers-live-fun-and-games-and-all-that-comes-with-it-back-to-basic-more) - [Creating a routing app with Google Maps API from scratch](https://www.wearedevelopers.com/videos/831-creating-a-routing-app-with-google-maps-api-from-scratch) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [A Technical Introduction to Bitcoin's 2nd Layer- The Lightning Network](https://www.wearedevelopers.com/videos/15-a-technical-introduction-to-bitcoin-s-2nd-layer-the-lightning-network) - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) ## Related Articles - [IT Salaries in UK](https://www.wearedevelopers.com/magazine/288-it-salaries-in-uk) - [Data Engineer Salary UK](https://www.wearedevelopers.com/magazine/253-data-engineer-salary-uk) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)