Senior Network Engineer

Senior Network Engineer (DV Cleared)

Role: Senior Network Engineer
Contract Length: 12 months
Location: Onsite (Aldermaston area) - 100% onsite
Clearance: Active DV Clearance (essential)
Nationality: Sole UK National
Rate: £581/day or £72.66/hour inside IR35

Role Overview

We are seeking an experienced Senior Network Engineer to support and operate a large, complex, and highly secure network environment. The role is hands-on and operational, requiring strong troubleshooting skills, deep Juniper expertise, and experience working within structured IT service environments.

You will be part of a senior engineering team responsible for maintaining network availability, security, and performance, with participation in an on-call rota and occasional out-of-hours work when required.

Key Responsibilities

• Support and maintain a large-scale enterprise network environment

• Diagnose and resolve complex network incidents and problems

• Configure, manage, and troubleshoot Juniper network and security platforms

• Support WAN/LAN infrastructure, routing, Firewalling, and high-availability designs

• Work within ITIL-based service management processes

• Document network configurations, processes, and changes clearly

• Engage with technical and non-technical stakeholders effectively

• Participate in on-call support and occasional travel to remote sites

Essential Skills & Experience

• Active DV Clearance

• Sole UK National

• Senior-level experience supporting large and complex network environments

• Strong networking fundamentals and troubleshooting capability

• Juniper Technologies:

  • EX, QFX switching

  • SRX/vSRX Firewalls and policy configuration

  • Junos Space, Security Director, Apstra

  • Virtual Chassis and clustering

  • EVPN/VXLAN

• Routing & Networking:

  • OSPF, BGP

  • GRE tunnels

  • VRFs/routing instances

  • WAN/LAN design, high availability

• Security & Platforms:

  • FortiGate

  • F5 BIG-IP (Load Balancing/WAF)

  • Pulse Secure/Ivanti

  • High-grade encryption

• Identity & Access Management:

  • Cisco ISE (full life cycle)

  • Windows NPS (RADIUS/802.1X)

• Monitoring & Core Services:

  • SolarWinds, Splunk

  • IPAM, DHCP, DNS

• Experience working within ITIL service management environments