Senior Infrastructure Engineer

Senior Infrastructure Engineer - Network Infrastructure | Firewalls | DV Clearable | On-Site
Location: East Birmingham (Full-Time, On-Site)
Salary: £47,000 - £55,000 + Benefits

Are you an experienced Infrastructure Engineer with strong networking expertise and a background in secure environments? This is a full-time, on-site role based in Marston Green, Birmingham, offering the opportunity to support mission-critical IT infrastructure within a security-sensitive organisation.

As a Senior Infrastructure Engineer, you will be responsible for delivering and managing secure LAN, WAN, and WLAN networks, acting as a key escalation point for troubleshooting, and providing mentoring to junior engineers. Candidates must be eligible for DV (Developed Vetting) clearance - British nationals with long-term UK residency only.

Key Responsibilities:

Deploy and manage LAN, WAN, and WLAN networks for secure enterprise environments

Troubleshoot complex Layer 2 and Layer 3 networking issues

Document network topologies and configurations

Monitor and enhance performance across network infrastructure

Install and maintain firewalls - Palo Alto, Cisco ASA (AnyConnect), FortiGate

Manage VPNs, IPSEC tunnels, and certificate-based authentication

Contribute to AD design and secure environment management

Mentor junior staff and act as a key escalation point

Participate in incident response and root cause analysis

Required Skills & Experience:

5+ years in a Network Engineer or Infrastructure Engineer role

Strong knowledge of TCP/IP, VLAN, VXLAN, EVPN, VPC, MLAG

Deep experience with BGP, OSPF, EIGRP routing protocols

Firewall configuration experience: Palo Alto, Cisco ASA, FortiGate

VPN setup and support (IPSEC, remote access)

Familiarity with Wireshark, SNMP, and monitoring tools

Cross-platform support (Windows, Linux, macOS)

Microsoft Active Directory design and maintenance experience

Strong documentation, communication, and team leadership skills

Desirable: CCNA/CCNP certifications

Must be DV clearable

If you're ready to work in a high-trust, high-security environment and bring your networking expertise to a forward-thinking organisation, click apply now to learn more