5G Network Engineer

5G RAN Optimisation Engineer - Network Optimisation - RAN technologies Marshall Wolfe are hiring on behalf of our client, who are a leading telecoms organisation. They are seeking an experienced 5G RAN Optimisation Specialist to join a high-performing Network Performance & Optimisation team supporting a critical Public Safety Network programme. This is a specialist role focused on 5G/5G+ performance optimisation, root cause analysis, and end-to-end network investigations across complex mobile network environments. You'll work closely with internal SMEs, vendors, and stakeholders to improve network performance, customer experience, and service reliability. This is a 12 month contract, which can be based in London or Bristol Key Responsibilities • Analyse UE logs, drive test data, Wireshark traces, OSS trends and protocol logs to identify performance issues. • Perform 4G/5G/5G+ parameter and feature optimisation activities across Nokia and Ericsson networks. • Conduct end-to-end investigations covering 5G SA, NSA, VoNR and network interworking scenarios. • Lead root cause analysis of network degradations and define optimisation plans to improve KPIs. • Validate network designs and assess performance impacts of new features and configurations. • Produce performance recommendations and operational best practices. • Collaborate with technical teams, suppliers and stakeholders to deliver performance improvements. Requirements: • Extensive experience in mobile network performance and optimisation within large-scale telecommunications environments. • Expert knowledge of 5G/5G+ investigations, RAN optimisation and end-to-end network troubleshooting. • Strong understanding of 4G LTE, 5G SA/NSA, VoNR, Network Slicing and SIP signalling. • Advanced experience with Wireshark, TEMS, Accuver, Actix, UE log analysis and protocol tracing. • Proven expertise analysing radio network KPIs, parameters, timers and performance metrics. • Experience working with Nokia and/or Ericsson RAN technologies. • Strong stakeholder management and communication skills with the ability to translate complex technical issues into clear business outcomes. Desirable: • Experience supporting Public Safety Network services. • Knowledge of SRTP/DTLS troubleshooting and optimisation. • Understanding of 3GPP and ETSI standards. • Experience working with third-party suppliers and vendors. • Knowledge of project delivery and telecommunications best practices. 12 month contract Inside IR35 | London or Bristol based (hybrid working)