Senior Network Engineer / SC Cleared / 6 Month Contract/ Inside IR35 / £550 / Hybrid / Milton Keynes The Senior Network Engineer will be responsible for designing, implementing, securing, and maintaining enterprise network infrastructure with a focus on high availability, performance, and resilience. This role provides advanced technical leadership across routing, switching, firewall administration, and network security operations. The engineer serves as an escalation point for complex issues involving Cisco switching platforms, Cisco Firepower Threat Defense (FTD), and Palo Alto Networks Next-Generation Firewalls, ensuring the network reliably supports business operations. Experience in support and design in highly secure environments. Cisco Switching, Routing, Security and wireless technologies Network Protocols TCP/IP, BGP, ICMP, OSPF, IPSEC Cisco ASA Firewall Administration and design Cisco Firepower ( NGFW) Palo Alto Firewall administration. Knowledge of Virtual Environments and virtual network solutions,(ie VMWare ) Experience in Cisco ISE and PRIME BIG IP F5 Administration Configuration – LTM, ASM Network Monitoring PRTG Cisco ACI Azure AWS experienceDesirable: Experience of working within a variety of ITIL4 environments. Knowledge of IT Service Management toolsets ie ServiceNow Key performance reporting and documentation Stakeholder Management Leadership skillsThe role requires the successful candidate to be onsite 3 days per week