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