Randstad
Network Engineering specialist
Network Engineering specialist at Randstad, based in London. This is a permanent role.
- Pay
- Not given by the employer
- Hours and contract
- Permanent · On site
- Location
- London
- Closing date
- Sector
- Engineering & Manufacturing
Reference PR-1551914
About the role
Overview:
We are looking for an experienced Network Engineering Specialist (4G ESN / Mobile RAN Performance SME) to shape mobile RAN strategy and optimize critical, high-availability networks. Operating in the 4G Emergency Services Network (ESN) domain, you will lead end-to-end performance analysis, troubleshoot complex protocol traces, and drive network fixes across enterprise mobile infrastructure.
Key Responsibilities:
- E2E Performance & Root Cause Analysis: Conduct deep-dive analysis using UE logs, drive tests, and Wireshark traces (L1-L7) to resolve underperforming KPIs and defects in ESN PTT over SRTP.
- Protocol & Network Optimization: Analyze eNodeB, Core Network, and OTT traces to resolve LTE, SIP signaling, and SRTP/DTLS performance issues.
- Vendor & Fix Delivery: Collaborate with delivery teams and external suppliers (Nokia/Ericsson) to propose, agree, and implement fixes.
- Data Storytelling: Translate complex technical network data into clear insights for technical and business stakeholders.
Requirements:
- Technical Expertise: Deep knowledge of 4G RAN macro networks, Public Safety over LTE/5G+, Nokia/Ericsson RAN, and 3GPP standards.
- Tools Proficiency: Hands-on experience with Accuver, TEMS/Nemo, Actix, Wireshark, and protocol analysis (SIP, PTT, SRTP, DTLS).
- Telecom Background: Proven track record as a performance SME in high-availability mobile networks working with 3rd-party suppliers.
Randstad Technologies is acting as an Employment Business in relation to this vacancy.
Reference: PR-1551914 · Posted 5 days ago · Closes 21 Nov 2026 · Listed via Randstad
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