Layer 3 Network Engineer (Network Assurance Lead) - Telecommunications

Are you looking for an exciting new opportunity? Join a UK-based fibre network provider committed to making high-speed broadband accessible to everyone, both in cities and rural communities. Headquartered in the North West of England, the organisation focuses on delivering fast, reliable and affordable full-fibre connectivity designed to stand the test of time. Working in partnership with Internet Service Providers, the organisation plays a key role in optimising the UK’s fibre network, improving rollout speed, reducing costs, and enhancing the overall customer experience.

Built on a collaborative culture, the company encourages its people, partners and suppliers to work together towards a shared purpose, valuing fresh ideas, inclusivity and making a meaningful impact through its work. If you would like to learn more about this opportunity, feel free to reach out and apply today! Responsibilities: Investigate complex end-to-end FTTP subscriber faults, including session drops, stale sessions, and re-authentication behaviour.

Analyse DHCP session establishment, Radius authentication flows, and lease failures. Validate subscriber states using third-party BNG session tools and ensure VLAN tagging and access alignment. Diagnose IP addressing, allocation issues, and MTU/fragmentation-related faults. Perform WAN/LAN packet capture analysis and deep-dive into CPE routing, NAT, and firewall behaviour. Validate ACS / TR-069 provisioning integrity and identify firmware-related behavioural faults.

Diagnose Wi-Fi performance issues, including RSSI, airtime utilization, and interference. Identify gaps in processes, tooling, and documentation to implement improvements that increase operational efficiency. Skills/Must have: Strong broadband fault diagnostic experience, with a heavy preference for FTTP. Practical understanding of DHCP and Radius flows within an IPoE (DHCP-based) environment. Solid IP networking fundamentals and the ability to interpret session data, logs, and diagnostic outputs.

Strong Wi-Fi troubleshooting knowledge and the ability to distinguish internal LAN issues from upstream faults. Ability to produce clear, structured technical escalations and present complex information to diverse audiences. Benefits: Direct reporting to the Head of Networks with ownership of major fault escalations. Proactively build and maintain a technical knowledge base for the entire team. Work in a positive, evidence-driven team focused on operational excellence.

Desirable Certifications: Support for candidates with CCNA-level knowledge or those looking to utilize ACS / TR-069 expertise. Salary: £45,000 Per Annum