Senior Network Engineer (Juniper/Cisco) - Active DV Cleared

LA International; Corsham; On-site; GBP 45,000 - 65,000; Full time

Job summary

LA International in Corsham is seeking an experienced Network Engineer to build and maintain secure network infrastructure supporting critical services. The role is ideal for someone moving from 3rd Line to 4th Line engineering, with legacy infrastructure training provided.

You will interpret LLDs and build guides, configure routers and switches, and work with security teams to ensure robust, compliant networks. Eligible candidates should hold DV clearance or be eligible to obtain it.

Qualifications

• 3rd Line network support with desire to progress to 4th Line.
• Experience with Juniper networking; strong Cisco experience also considered.
• Good knowledge of routing, switching, MPLS, and BGP.
• Experience supporting enterprise network firewalls.
• Ability to configure, troubleshoot, and fault-find network devices.
• Experience interpreting LLDs, Build Guides, and Work Instructions.
• Strong analytical and problem-solving skills.
• Knowledge of hardware encryption technologies; training provided where required.
• Excellent communication and teamwork.
• Ex-Military Signals experience advantageous.

Responsibilities

• Build, configure, and support secure network devices.
• Configure, troubleshoot, and fault‑find enterprise network infrastructure.
• Interpret Low Level Designs (LLDs), Build Guides, and Work Instructions to deliver technical solutions.
• Support routing, switching, firewall, and network infrastructure deployments.
• Work with technical teams to deliver secure infrastructure changes.
• Diagnose and resolve complex networking issues.
• Support service improvements and infrastructure enhancement activities.
• Maintain accurate technical documentation and implementation records.

Skills

3rd Line support

Juniper networking

Cisco networking

Routing and Switching

MPLS

BGP

Firewall support

LLD interpretation

Security clearance

Job description

LA International in Corsham is seeking an experienced Network Engineer to build and maintain secure network infrastructure supporting critical services. The role is ideal for someone moving from 3rd Line to 4th Line engineering, with legacy infrastructure training provided.

You will interpret LLDs and build guides, configure routers and switches, and work with security teams to ensure robust, compliant networks. Eligible candidates should hold DV clearance or be eligible to obtain it.