Network Engineer (L3/L4) at Thorn SDS

Rudloe, England, United Kingdom -

Full Time

Start Date

Immediate

Expiry Date

21 Jun, 26

Salary

0.0

Posted On

23 Mar, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Network Engineer, L3 Support, L4 Support, LAN, WAN, Routing, Switching, Firewalls, VPNs, Network Monitoring, Performance Tuning, Capacity Planning, ITIL, Security Compliance, Troubleshooting, Layer 2/Layer 3 Networking

Industry

IT System Operations and Maintenance

Description

Are you a skilled Network Engineer looking to support a nationally significant UK Defence programme? This is a unique opportunity to join a high-impact programme delivering next-generation deployable IT services to support operations both in the UK and overseas. About the Programme The programme is transforming the MOD’s deployable IT capability across Land and Maritime domains. It is replacing legacy CIS services with a modern, secure, and resilient in-house solution designed to meet the demands of frontline operations. A core element of this transformation is the delivery of robust Through Life Support (TLS) services—ensuring systems remain operational, secure, and fully supported in dynamic and often challenging environments. The Role As a Level 3 or 4 Network Engineer, you will provide advanced technical support and operational management for all network infrastructure components. You will work closely with Service Desk, Resolver Groups, and Level 4 engineers to maintain secure, reliable, and high-performance networks. You will: Provide Level 3 support for network infrastructure, including LAN, WAN, and deployed operational networks Troubleshoot and resolve incidents across Layer 3 (network connectivity, routing, switching) and Layer 4 (applications and services running on the network) Manage, configure, and maintain network devices such as switches, routers, firewalls, and VPNs Support network monitoring, performance tuning, and capacity planning Implement network changes, upgrades, and patching in line with ITIL processes and programme policies Collaborate with Level 4 engineers and cross-functional teams for escalated incidents or complex projects Ensure network security and compliance with MOD policies and standards Support operational deployments for both on-premises and deployed environments What We’re Looking For Proven experience at SFIA Level 3 in enterprise or operational network environments Strong knowledge of: Layer 2/Layer 3 networking (routing, switching, VLANs) Firewalls, VPNs, and secure network connectivity Monitoring, performance tuning, and troubleshooting network infrastructure L4 application dependencies and their interaction with network performance Experience in secure or regulated environments, ideally defence-related Solid understanding of ITIL-aligned service management processes Excellent problem-solving, analytical, and communication skills Ability to work on-site at Corsham full-time Important Note Due to the nature of this work, candidates must be eligible for appropriate UK security clearance. All applicants must hold the Right to Work in the UK and already possess, or be eligible to obtain, a high level of National Security Clearance. Due to the nature of our business, your nationality, previous nationalities, and country of birth may influence the types of roles for which you are eligible. For more details, visit the GOV.UK website or click here. Why Join? Work on a mission-critical national defence programme Maintain and optimise advanced network infrastructure supporting deployed operations Opportunity to develop skills in highly secure, complex IT environments 25 days Annual Leave (plus Bank Holidays) Employer Pension Contributions Group Life Insurance Dental & Health Cashback Plan Wellbeing Services (includes GP, Physio and Savings Benefits) Thorn Wellbeing Support Contribution Employee Referral Scheme Supported Training & Personal Development Opportunities Apply If you have the expertise to support this requirement and are eager to make an impact in a critical role, please apply today!

Responsibilities

The Network Engineer will provide advanced technical support and operational management for all network infrastructure components, including LAN, WAN, and deployed operational networks. This involves troubleshooting Layer 3 and Layer 4 incidents, managing devices like switches and firewalls, and implementing changes according to ITIL processes.