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.
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
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.