Main activities and tasks:
- Provide second-line operational support for the Core network, ensuring high availability, stability, and service quality.
- Manage the lifecycle of Core-related Incidents, Problems, and Changes, coordinating with vendors, field engineers, and stakeholders.
- Perform configuration, integration, and maintenance of Core nodes across legacy and cloud-native platforms.
- Monitor performance KPIs, signalling flows, and service quality metrics, proactively detecting degradations and implementing corrective actions.
- Participate in Change Management, planning and executing software upgrades, capacity expansions, parameter changes, and feature activations in line with approved Methods of Procedure (MoPs).
- Conduct acceptance testing and validation for new Core nodes, releases, and services before production rollout.
- Provide remote technical support for Core-related implementation or troubleshooting activities, including interworking with RAN, IP transport, and Data Centre teams.
- Support Problem Management by performing root cause analysis (RCA) of recurring service issues and recommending permanent fixes.
- Deliver reports and documentation on incidents, performance trends, and network changes, contributing to the operational knowledge base.
- Participate in public event assurance by monitoring Core traffic and subscriber sessions during peak or special events.
- Cover 24x7 on-call duties, acting as technical authority for Core-related escalations.
Required Experience:
- Hands-on operational experience with Core network elements.
- Familiarity with NFVI / Cloud Native platforms and Core virtualisation.
- Strong background in Incident, Problem, and Change Management in telecom Core networks.
- Knowledge of interworking between RAN, IP/MPLS, and Core.
- Experience in Managed Services or NOC environments is desirable.
Specific skills & technical knowledge:
- Good understanding of CS Core architecture, including MSC-S, MGw, GMSC, SS7 FW, and signalling interworking with PS and IMS domains.
- Knowledge of CS Core interfaces (A, Iu-CS, MAP, CAP, ISUP) and related signalling protocols.
- Familiarity with voice call control, roaming, and supplementary services.
- Awareness of SR-VCC and IMS interworking for VoLTE fallback.
- Experience analysing CS Core KPIs such as call setup success rate, handover success rate, and congestion management.
What We Offer:
- Growth Opportunities – Support for learning and career advancement.
- Work-Life Balance – Flexible hours and hybrid work options.
- Inclusive Culture – A welcoming, diverse environment where everyone feels valued.
- Generous Time Off
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