About this role
Salary: £? - ? per year
Requirements: Extensive experience as a Network Performance or RAN Optimisation subject matter expert in mobile telecommunicationsDeep expertise in LTE, 5G and 5G+ performance management and optimisationStrong understanding of KPI definition, design, measurement and benchmarkingExpert-level knowledge of Nokia RAN performance management and optimisationHands-on experience investigating and optimising 4G LTE, 5G SA and NSA, VoNR, network slicing and end-to-end mobile servicesStrong understanding of Ericsson and Nokia counters, KPIs and troubleshooting methodologiesAbility to analyse drive test logs, Wireshark and protocol analyser traces, UE Layer 1–3 logs and OSS performance dataIn-depth knowledge of LTE and 5G signallingExperience troubleshooting SIP, SRTP, DTLS and Push-to-Talk servicesKnowledge of 3GPP and ETSI standardsStrong stakeholder management and communication skillsExperience with Nokia RAN, Ericsson RAN, Wireshark, Actix, Nemo, TEMS, Accuver, LTE parameters and timers, and OSS performance platformsDesirable experience in multi-vendor optimisation environments, emergency services or public safety networks, LTE/5G mission-critical communications, supplier and third-party vendor management, project delivery and network transformation, or technical solution design and requirements management Responsibilities: Lead 4G/5G ESN performance management activities to exceed service SLAs and customer experience expectationsDesign, define and evolve performance KPIs aligned with real user experienceConduct root cause analysis of network performance issues across RAN and end-to-end servicesDevelop optimisation plans using OSS trends, network counters, KPIs, crowdsourced data and customer performance metricsPerform feature and parameter optimisation trials across Nokia and Ericsson RAN networksEvaluate trial outcomes, quantify gains and assess wider network impactsDrive improvements in 5G Standalone, Non-Standalone and 4G/5G interworking performanceAnalyse drive test logs, protocol traces and performance data to identify service-affecting issuesInvestigate systematic network defects affecting public safety services, including Push-to-Talk performanceCollaborate with suppliers, vendors and internal stakeholders to deliver effective resolution plansProvide technical leadership and share knowledge across the optimisation community Technologies: E2ESupportMobileNetworkOSSSecurity More:
We are seeking an experienced ESN 5G RAN/E2E Performance & Parameter Optimisation Specialist to support delivery and optimisation of the UKs Emergency Services Network. This high-impact role is part of the RAN Systematic Optimisation Team and focuses on performance, reliability and customer experience across a critical communications network. Working alongside industry experts, you will help shape network performance strategy, optimisation initiatives, performance targets, KPI frameworks, SLA achievement and future 5G+ capabilities. The role is based in London or Bristol on a hybrid basis, for a six-month contract with an ASAP start. BPSS security clearance is required.
last updated 40 week of 2026