Salary: £110,000 - 110,000 per year Requirements: Proven experience as a Network / Systems Engineer in complex environments Strong expertise in Cisco networking technologies Hands-on experience with routers and firewalls Experience with Palo Alto firewalls Working knowledge of Nokia 7705 platforms Strong troubleshooting and diagnostic skills Ability to work in operationally critical, regulated environments CCNA (required) CCNP (preferred) Responsibilities: Design, support, maintain, and troubleshoot enterprise network infrastructure Configure and manage network hardware including routers, firewalls, and switches Provide operational support for mission-critical systems in a high-availability environment Work with Cisco networking technologies across LAN, WAN, and security domains Support and maintain firewall solutions, including Palo Alto Operate and manage Nokia 7705 platforms Participate in on-site support at airport locations when required Ensure compliance with security, operational, and safety standards Collaborate with internal teams and stakeholders to resolve network issues and implement changes Technologies: Cisco Firewall Hardware Support LAN NATS Network Security More: We at NATS are seeking an experienced Network Systems Engineer to support and maintain critical network infrastructure within a highly regulated, safety-critical environment. The successful contractor will become part of our specialist engineering team, dedicated to ensuring the availability, performance, and security of complex network systems. This hybrid position is primarily based in Whiteley, with occasional on-site support at UK Airport locations. We offer a competitive contract rate with a focus on professionalism and teamwork. last updated 17 week of 2026