Tier 3 Network Engineer
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Job description
Date Posted: 2026-03-16Country: United KingdomLocation: Warminster, WiltshirePosition Role Type: HybridRaytheon UK is searching for a Tier 3 Network Engineer to join our OMNIA® Training team.As a Tier 3 Network Engineer, you will be critical to the successful delivery of the programme, collaborating within matrix organisation, with multi-disciplinary teams within EngineeringOMNIA are redefining the British Army's collective training. To do that, we are looking for the best and brightest minds from across the UK. We are backed by British innovation and powered by world-class experts, like you.We are looking for individuals who want to serve. You'll have a mission focus, and the enthusiasm and drive to deliver. You must be eligible and willing to obtain SC clearance and will be based at Warminster working in a hybrid style.The role: This is more than a job - it's a mission. You will be part of a high-impact, collaborative environment, where we expect everyone to live the values and standards of the British Army. Every person in our team plays a critical role in delivering OMNIA's vision; designing, delivering, and transforming collective training so the British Army is ready to fight and win.You'll work in a matrix organisation and report operationally through OMNIA Training and functionally through the Tier 2 Support Lead . Ultimately, you'll work for the British Army, championing innovation, and helping shape the future of military collective training.Key Responsibilities:
- Provide Tier 3 technical support for complex network issues affecting live production systems, training platforms, and business services.
- Act as the highest level of escalation for network-related incidents and service outages.
- Diagnose and resolve advanced networking issues across cloud, on-premise, and hybrid infrastructure environments.
- Support incident, problem, and change management processes in accordance with ITIL service management practices.
- Lead root cause analysis and remediation activities for major network incidents.
- Maintain and optimise network performance, reliability, and availability across operational environments.
- Support network configuration, upgrades, patching, and vulnerability remediation activities.
- Work closely with infrastructure, cloud, and platform engineering teams to support system deployments and network integrations.
- Monitor network performance and security using monitoring, logging, and observability tools.
- Maintain accurate network documentation including topology diagrams, configuration records, and operational procedures.
Requirements
- Proven experience providing Tier 3 network support within complex enterprise or operational environments.
- Strong expertise in networking technologies including routing, switching, firewalling, VPNs, and network security.
- Experience supporting cloud networking environments (e.g. Azure Virtual Networks, AWS VPCs).
- Knowledge of deployable satellite internet constellations (e.g. Starlink) or similar technologies.
- Knowledge of 4/5G network solutions and technologies.
- Experience diagnosing and resolving complex network issues across distributed or hybrid environments.
- Experience supporting container networking and service connectivity within platforms such as Kubernetes, Docker or OpenShift.
- Experience performing root cause analysis and leading resolution of major incidents.
- Familiarity with ITIL service management practices including incident, problem, and change management.
- Experience with network monitoring and observability tools (e.g. SolarWinds, Prometheus, Grafana, ELK).
- Strong understanding of network security practices including segmentation, firewall rules, and secure connectivity.
- Relevant networking certification (e.g. CCNP or equivalent experience).
- Holds or is eligible for UK Security Clearance (SC).
Desirable Skills and Experience:
- Experience supporting networking within modelling and simulation environments, particularly Live, Virtual, and Constructive (LVC) training systems.
- Experience working with cloud-native networking architectures and microservices environments.
- Familiarity with software-defined networking (SDN) and network automation practices.
- Experience supporting hybrid network architectures spanning on-premise and cloud platforms.
- Experience with Red Hat OpenShift.
- Experience of deployable satellite internet constellations (e.g. Starlink) or similar technologies.
- Experience of 4/5G network solutions and technologies.
- Experience supporting applications within complex system or platform environments.
- Understanding of DevOps or DevSecOps environments and support practices.
- Advanced networking certifications (e.g. CCIE, cloud networking certifications, or equivalent).
Benefits & conditions
- You will join at a unique time, where you can join in shaping this team and be rewarded with ongoing development opportunities, and clear pathways to progress within a trusted defence industry partner.
- 37hr working week with early finish Fridays - start your weekend early!
- 25 days holiday + statutory public holidays, plus opportunity to buy and sell up to 5 days and up to 5 paid days volunteering
- 10.5% company pension contribution with 6% employee contribution
- Annual company bonus scheme (discretionary)
- 6 times salary Life Assurance with pension
- Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work, amongst others
- Enhanced sick pay
- Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave
