Core Network and VAS Manager at Lebara Nigeria

Role Summary

• The Core Network Manager is responsible for the planning, deployment, configuration, operation, and maintenance of the MVNO’s core network elements, ensuring seamless service delivery to subscribers. This includes EPC, IMS, Diameter routing, signaling, interconnect, and integration with the host MNO’s infrastructure. Responsible for the planning, deployment, integration, and lifecycle management of all Value-Added Services in the MVNO network. This includes SMSC, MMSC, USSD, voicemail, IVR, CRBT, mobile apps, and digital service platforms. The role ensures high network availability, capacity optimization, and compliance with regulatory requirements.

Key Responsibilities

Network Operations & Maintenance

• Manage and maintain EPC (MME, SGW, PGW), IMS, and HSS/UDM platforms.
• Oversee Diameter routing, signaling gateways, and IP routing infrastructure.
• Monitor network KPIs and proactively address performance issues.

Integration & Interconnect

• Manage interconnect links with the host MNO and roaming partners.
• Ensure seamless integration of MVNO services with the MNO’s core network.

Capacity & Planning

• Forecast capacity needs based on subscriber growth and usage trends.
• Plan and implement hardware and software upgrades.

Security & Compliance

• Ensure network security with firewalls, SEPP, and encryption.
• Maintain compliance with local telecom regulations and lawful intercept requirements.

Incident & Problem Management

• Lead incident resolution and root cause analysis for network faults.
• Coordinate with NOC, IT, and vendor support teams for issue resolution.

Vendor & Project Management

• Manage relationships with core network equipment vendors.
• Oversee deployment projects and software updates.

Required Skills & Qualifications

• Education: Bachelor’s degree in Telecommunications, Electrical/Electronic Engineering, or related field.
• Experience: Minimum 10 years in mobile core network operations (EPC, IMS, HSS/HLR).
• Technical Knowledge:
  • EPC (MME, SGW, PGW), IMS, Diameter, HSS/UDM.
  • Signaling protocols: SS7, Diameter, SIP.
  • IP networking: IPv4/IPv6, BGP, OSPF, MPLS.
  • Security: Firewalls, SEPP, VPNs.
  • Deep understanding of SMSC, MMSC, USSD gateways, IVR, CRBT, voicemail platforms.
  • Familiarity with APIs, content delivery platforms, OTT integration, and mobile apps.
  • Knowledge of signaling protocols (SMPP, SIP, MAP, Diameter, HTTP APIs).
• Certifications (Preferred): Cisco CCNP/CCIE, Nokia, Ericsson, Huawei core certifications.
• Strong troubleshooting, analytical, and documentation skills.

KPIs & Performance Metrics

• Core network availability (%)
• Mean Time to Repair (MTTR)
• KPI compliance with SLA targets
• Successful completion of upgrades/projects on time and within budget