2L Voice Core Engineer - VOIS

Core Network Support Support IMS network elements including Ericsson MTAS, CSCF, HSS, IPWorks, MSC, MGW, SBC, and STP. Maintain service availability, performance, and compliance with operational processes. Participate in 24x7 on‑call rotation for proactive and reactive support. Assist in service introduction and handle supplier engagement. Perform root cause analysis and workarounds to minimise service disruption. Collaborate across teams to ensure timely resolution. Performance & Availability Management Perform fraud barring for A and B numbers. Support isolation of nodes from MSC for other teams. Support vendor issue resolution and track SLAs. Participate in compliance audits. Ensure changes are implemented safely and efficiently. Facilitate knowledge transfer within the team and wider organisation. Provide guidance to less experienced colleagues and frontline teams. Maintain clear stakeholder communication. Strong understanding of IMS architecture (CSCF, MTAS, HSS, SBC) and CS Core nodes (MSC, MGW).Skilled in telecom protocols such as SIP, Diameter, SS7, SIGTRAN.Experienced in VoLTE/VoNR call flows and IMS registration.Familiar with virtualisation platforms (VMware, OpenStack) and Linux systems.Capable of troubleshooting using tools and scripting (Python/Bash preferred).Comfortable working in high‑pressure, 24x7 operational environments.Effective communicator with strong collaboration abilities.Adaptable to emerging technologies including NFV, SDN, and Cloud IMS.Holds a Bachelor's degree in Telecommunications, Electronics, or Computer Engineering.Possesses 8-12 years of experience in IMS and CS Core operations, ideally across multi‑vendor environments.Certifications such as CCNA/CCNP are preferred. Not a perfect fit? If you are excited about this role but your experience does not align exactly with every aspect of the job description, you are encouraged to apply. You may be the right candidate for this or another opportunity, and the recruitment team will support you in exploring where your skills fit best.