Network and Firewall Specialist

Network & Firewall Specialist Location: Aldermaston (100% onsite) Contract: 12 months | IR35: In Scope Rate: £44.99/hr Umbrella Clearance: Active DV required (Sole UK Nationals only) Overview We are seeking experienced Network & Firewall Specialists to join a secure environment. This hands-on role involves installing, configuring, and troubleshooting network devices, with a focus on Juniper technologies, network security, and high-availability infrastructure. Key Requirements * Strong Juniper experience (EX, QFX, SRX / vSRX) * Experience installing switches and firewalls * Solid networking knowledge (OSPF, BGP, WAN/LAN design, clustering) * Experience with EVPN/VXLAN, VRFs, GRE tunnels * Familiarity with PKI / certificate management * Technical background Responsibilities * Monitor network performance and manage incidents * Troubleshoot and resolve network issues * Support capacity and availability planning * Work with stakeholders and third parties * Produce Low-Level Designs (LLDs) * Provision and configure network devices Additional Info * Participation in on-call rota; occasional evenings/weekends * Travel to remote sites may be required (including overnight stays) * 1-stage MS Teams interview