Tier 3 Network Engineer

Raytheon UK is searching for a Tier 3 Network Engineer to join our OMNIA Training team. The role is hybrid, based in Warminster, Wiltshire, and requires SC clearance.

• 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.

We're looking for individuals who want to serve. You will have a mission focus, enthusiasm to get things done, and a willingness to collaborate with defence training organisations and the British Army. A military background is not required, but an understanding of the importance of serving and prioritising the mission is essential.

• 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 for example Azure Virtual Networks, AWS VPCs.
• Knowledge of deployable satellite internet constellations for example 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 Open Shift.
• 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 for example Solar Winds, Prometheus, Grafana, ELK.
• Strong understanding of network security practices including segmentation, firewall rules, and secure connectivity.
• Relevant networking certification for example CCNP or equivalent experience.
• Holds or is eligible for UK Security Clearance (SC).

• 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 and network automation practices.
• Experience supporting hybrid network architectures spanning on-premise and cloud platforms.
• Experience with Red Hat Open Shift.
• Advanced networking certifications for example CCIE or cloud networking certifications.

• 37 hour working week with early finish Fridays.
• 25 days holiday plus statutory public holidays, and opportunity to buy/sell up to 5 days.
• 10.5% company pension contribution with 6% employee contribution.
• Annual company bonus scheme (discretionary).
• Life assurance with pension.
• Flexible benefits scheme with salary sacrifice options including Health Cashplan, Dental, Cycle to Work.
• Enhanced sick pay.
• Enhanced family friendly policies including enhanced maternity, paternity, and shared parental leave.

RTX Raytheon UK is a landed company and part of the RTX organisation, dedicated to advancing defence technology. RTX adheres to the principles of equal employment. All qualified applications will be given careful consideration without regard to ethnicity, color, religion, gender or sexual orientation, national origin, age, disability, protected veteran status or any other characteristic protected by law.