Senior Infrastructure Engineer

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.