About this role
Salary: £? - ? per year
Requirements: Extensive experience in mobile telecommunications as a RAN Performance or Optimisation SMEStrong expertise in UE log analysis, Wireshark tracing, and end-to-end network troubleshootingDeep understanding of 4G/LTE networks, radio performance optimisation, and public safety communicationsProven experience analysing drive test logs, protocol traces, and network KPIsStrong knowledge of LTE signalling and procedures, SIP protocols, Push-to-Talk (PTT) services, SRTP and DTLS troubleshooting, and LTE parameters and timersHands-on experience with tools such as Accuver, Nemo, TEMS, Actix, and WiresharkExperience working with Nokia RAN solutionsAbility to communicate complex technical findings to technical and non-technical stakeholdersStrong analytical and problem-solving skills with a data-driven approachExperience with LTE-based public safety or mission-critical communications networks is desirableKnowledge of Ericsson, Huawei, or Parallel Wireless technologies is desirableFamiliarity with 3GPP and ETSI standards is desirableExperience managing third-party vendors and suppliers is desirableUnderstanding of project delivery methodologies and network transformation programmes is desirableBPSS security clearance required Responsibilities: Analyse UE logs, network traces, and protocol captures to identify performance issues and service degradationTroubleshoot LTE networks end to end, including SIP signalling, Push-to-Talk (PTT), SRTP, and DTLS servicesAnalyse drive test logs and network protocol traces to determine the root causes of defects and underperforming KPIsInvestigate systematic issues affecting ESN performance and customer experienceUse data from UE application events and Layer 1–3 logs, drive testing and Wireshark traces, eNodeB and Core Network signalling, OTT protocol traces, coverage, capacity and OSS performance data, and network change recordsCollaborate with engineering, delivery, and vendor teams to define and implement corrective actionsSupport the development of performance optimisation strategies, best practices, and network improvementsProvide technical leadership and subject matter expertise on ESN-related performance issues Technologies: SupportMobileNetworkOSSSecurity More:
Were partnering with a leading telecommunications organisation at the forefront of critical national infrastructure to recruit an ESN Specialist – RAN. This role supports the optimisation and performance of a high-profile Emergency Services Network, helping maintain service availability and user experience for mission-critical communications. Youll work within a specialist RAN Performance & Optimisation team and collaborate with engineering, delivery, and vendor teams. The position is based in London or Bristol on a hybrid basis, for a six-month contract, with an ASAP start. Were looking for a proactive problem solver who can work independently, influence decisions, manage stakeholders, and drive measurable network performance improvements. The opportunity may suit an experienced RAN Performance Engineer, RAN Optimisation Specialist, LTE Performance Consultant, or Mobile Network SME.
last updated 40 week of 2026