Network Engineer

Investigo Limited; Stafford; On-site; GBP 45,000 - 65,000; Full time

Job summary

A leading recruitment firm seeks a Network Engineer in Stafford to design and maintain LAN infrastructures. You will require proven experience with FortiGate firewalls and Cisco switches, as well as active NPPV3 clearance. The role offers an initial 6-month contract with potential extensions in a secure public sector environment.

Qualifications

• Proven experience in enterprise networking focused on FortiGate and Cisco.
• Hands-on experience designing and deploying LAN environments.
• Strong knowledge of network security and high-availability design.

Responsibilities

• Design, implement, and maintain secure LAN infrastructures.
• Configure and manage FortiGate firewalls for security.
• Collaborate with teams for seamless service transitions.

Skills

FortiGate firewall configuration

Cisco LAN switch configuration

Routing and Switching

Network security principles

VLANs and subnetting

VPNs

Capacity planning

Job description

Network Engineer - Onsite | Inside IR35 | NPPV3 Cleared

We're seeking a highly capable Network Engineer to support a secure, high-availability environment for a critical UK public sector programme. This role sits within a technically mature infrastructure team delivering network design, build, and operational support across multiple secure sites.

You'll be joining an environment where reliability, scalability, and compliance are non-negotiable. The successful engineer will play a central role in shaping and maintaining the organisation's LAN architecture, ensuring resilience, performance, and security throughout the network estate.

Key Responsibilities

• Design, implement, and maintain secure LAN infrastructures across multiple physical locations
• Configure and manage FortiGate firewalls, including rule sets, VPNs, and policy optimisation
• Deploy, integrate, and manage Cisco LAN switches to enterprise standards
• Lead the build-out of new LAN environments from scratch, including configuration, testing, and documentation
• Conduct proactive performance monitoring, capacity planning, and incident response
• Collaborate closely with infrastructure, security, and project delivery teams to ensure seamless service transitions
• Support audits, compliance checks, and vulnerability remediation within secure networks

Essential Skills and Experience

• Proven experience in enterprise networking with a strong focus on FortiGate firewalls and Cisco switch configuration
• Hands‑on experience designing and deploying LAN environments (from greenfield through to production)
• Excellent understanding of routing, switching, VLANs, subnetting, VPNs, and network segmentation
• Strong knowledge of network security principles, high‑availability design, and resilience planning
• Experience working within secure or regulated environments (Public Sector, Defence, or similar)
• Ability to produce detailed technical documentation and handover materials

Clearance Requirement

• Active NPPV3 clearance is essential for this role (cannot consider applicants without this level).

Contract Details

• Location: Onsite
• Contract Type: Inside IR35
• Duration: Initial 6 months with likely extensions