Problem Manager - Core

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About this opportunity:
We are now looking for a Problem Manager - Core Domain who will be responsible for managing, analyzing, and preventing recurring incidents across large-scale CS & PS Core Networks and Core Network Infrastructure. The role focuses on root cause analysis, trend analysis, stakeholder coordination, and continuous service improvement, while working closely with L2/L3 operations, vendors, and engineering teams.
What you will do• Own and manage the end-to-end Problem Management lifecycle for Core Network domains (CS Core & Packet Core)• Perform root cause analysis (RCA) for major and recurring incidents and ensure permanent corrective actions• Coordinate with L2/L3 operations, engineering, vendors, and external stakeholders to drive problem resolution• Track and analyze incident trends, identify systemic issues, and recommend preventive measures• Ensure problem resolution activities are delivered within agreed SLAs and OLAs• Drive preventive and corrective maintenance initiatives to reduce incident recurrence• Review and validate network changes to ensure risks are identified and mitigated• Perform network configuration audits and support service stability improvements• Provide technical guidance and mentorship to L2 operation engineers to ensure process consistency and quality• Create and maintain problem records, knowledge articles, and best practices documentation• Lead post-incident reviews, major incident follow-ups, and service improvement plans• Support continuous improvement initiatives and operational excellence programs• Handle day-to-day problem reporting, dashboards, and management updates
You will bring• 7 to 14 years of experience in Telecommunications• 5-8 years of strong domain experience in CS Core and/or Packet Core• Solid understanding of ITIL Problem Management processes and operational best practices• Clear understanding of 3GPP standards and protocols such as SIP, Diameter, BICC, SIGTRAN, CAMEL, MAP, etc.• Strong understanding of 2G/3G/4G Core Network nodes, protocols, and signaling flows• In-depth knowledge of voice core scenarios and signaling flows• In-depth knowledge of data core scenarios and signaling flows• Strong hands-on experience with Voice Core CS nodes such as MSC, MGWs, STP, UDC, APG, etc.• Very good knowledge of Packet Core nodes including SGSN-MME, GGSN (EPG), SAPC (PCRF)• Good understanding of Packet Core surrounding nodes (IMS, OCC, IPWorks DNS, Charging Nodes)• Understanding of 5G NSA and 5G SA architectures and call flows• Deep knowledge of roaming data and call flows, including GRX architecture• Strong understanding of IMS call flows• Excellent IP networking background• MPBN knowledge• Very good knowledge of Linux operating systems• Good understanding of Virtualization, Cloud NFVI, NFVO, and cloud infrastructure• Strong analytical, troubleshooting, and presentation skills• Ability to plan and execute context-specific analysis and problem-solving frameworks in collaboration with stakeholders and vendors• Ability to innovate and drive improvement initiatives that enhance service stability and customer experience• Self-driven, self-motivated, ambitious, and effective in handling complex operational challenges• Excellent communication skills (verbal & written) with strong customer and stakeholder handling capabilities