About this job
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:
1. Deploy and manage LAN, WAN, and WLAN networks for secure enterprise environments
2. Troubleshoot complex Layer 2 and Layer 3 networking issues
3. Document network topologies and configurations
4. Monitor and enhance performance across network infrastructure
5. Install and maintain firewalls - Palo Alto, Cisco ASA (AnyConnect), FortiGate
6. Manage VPNs, IPSEC tunnels, and certificate-based authentication
7. Contribute to AD design and secure environment management
8. Mentor junior staff and act as a key escalation point
9. Participate in incident response and root cause analysis
Required Skills & Experience:
10. 5+ years in a Network Engineer or Infrastructure Engineer role
11. Strong knowledge of TCP/IP, VLAN, VXLAN, EVPN, VPC, MLAG
12. Deep experience with BGP, OSPF, EIGRP routing protocols
13. Firewall configuration experience: Palo Alto, Cisco ASA, FortiGate
14. VPN setup and support (IPSEC, remote access)
15. Familiarity with Wireshark, SNMP, and monitoring tools
16. Cross-platform support (Windows, Linux, macOS)
17. Microsoft Active Directory design and maintenance experience
18. Strong documentation, communication, and team leadership skills
19. Desirable: CCNA/CCNP certifications
20. 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.