Senior Engineer – Mobile Core, Telecoms

About the role

We are looking for a Senior Engineer to lead the operation and optimisation of our Mobile Core network in Gibraltar. The role works closely with Mobile Packet Core, Fixed Voice, Radio Access and other cross‑functional teams to ensure high‑quality voice services.

Key responsibilities

• Support Mobile Core network elements, maintaining KPIs and SLAs.
• Participate in 24x7 on‑call rotation for proactive and reactive support.
• Coordinate service roll‑outs and manage vendor tickets.
• Investigate and resolve escalated issues, major incidents and service degradations.
• Capture and analyse protocol traces, troubleshoot signalling protocols.
• Monitor performance trends, conduct resilience assessments and drive continuous improvements.

Required profile

• Solid understanding of Mobile Voice Core Networks IMS/CS architectures.
• Proven hands‑on experience with Ericsson nodes such as MSC‑S, M‑MGw, STP, CSCF, MTAS, SBC, BGF, HLR‑FE, AuC‑FE, MNP‑FE, HSS‑FE.
• Minimum 10 + years of experience in Mobile Core network operations.

Required skills

• Protocols: H.248, SS7, ISUP, BICC, SIGTRAN, INAP, CAP, TCAP, MAP, SCCP, SIP/SDP, Diameter (Cx, Sh, Rx).
• Deep knowledge of 2G, 4G and 5G mobile network architectures and E2E call flows.

What we offer

• Competitive salary and comprehensive benefits including private health insurance.
• Wellness allowance and access to wellness programmes.
• Opportunity to work in a vibrant, collaborative telecom environment.