Sione Folaumoetu'i Likiliki
Engineer - Mobile Core Network @ Tonga Communications Corporation
About
Mobile Core Network Engineer with experience across 2G–5G networks and a strong background in multi-vendor system evolution (CPDI → Alcatel → Altobridge → Huawei). Skilled in OCS, VAS, prepaid systems, Linux, virtualization, servers, and Huawei/Cisco switching infrastructure. Proven ability to support large-scale migrations, knowledge transitions, and system integrations, delivering reliable telecom solutions with minimal downtime while maintaining service continuity and revenue integrity. Beyond my professional role, I am deeply passionate about fitness, wellness, and community development. I am a co-founder and active leader of To’a Fatalona, a community-driven fitness movement focused on discipline, consistency, and empowering individuals to improve their physical and mental well-being. Through structured training programs and team-based challenges, we promote a culture of accountability, resilience, and growth. I believe the same principles apply across both engineering and life — consistency, discipline, and continuous improvement.
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Tonga
Telecommunications
Leadership & Team Management, KPI Analysis & Capacity Planning, Huawei Core Network & Cisco Switching, Linux / Virtualization / Servers, Vendor & SLA Management, Change Management & Risk Control, VAS / USSD / SMS Platforms, OCS (Charging Systems) & Revenue Assurance, Core Network Governance (2G–5G), Core Network Operations (2G–4G/5G), VAS (USSD / SMS), Technical Supervision, OCS Configuration & Charging Logic, Prepaid Systems & Charging Logic, VAS Platforms, Service Provisioning, RCA & Troubleshooting, System Integration, Vendor Coordination, International Voice Transmission
Experience
Engineer - Mobile Core Network
Tonga Communications Corporation
Tonga
• Lead governance, performance, and operations of Mobile Core Network (2G–5G), Huawei OCS, and VAS platforms. • Approve and oversee core network configurations, integrations, upgrades, and change management activities. • Provide strategic oversight of charging systems (OCS) ensuring revenue protection and charging accuracy. • Lead migration, integration, and lifecycle planning of telecom platforms. • Ensure security, risk management, and business continuity (DR planning) across core systems. • Provide leadership and supervision of Assistant Engineer and STO teams.
Assistant Engineer - Mobile Network
Tonga Communications Corporation
Tonga
• Led day-to-day technical operations of Core Network, OCS, and VAS platforms. • Implemented and validated approved configurations, integrations, and system changes. • Implemented and validated approved configurations, integrations, and system changes. • Managed OCS charging configurations (tariffs, bundles, logic) and validated billing accuracy. • Configured and supported VAS platforms (USSD flows, SMS broadcasting). • Performed core network optimization, fault resolution, and KPI monitoring. • Supported roaming configurations and testing (IREG, TADIG). • Coordinated with vendors for technical troubleshooting and integration support. • Supervised STO operations and ensured operational discipline and escalation handling
Senior Technical Officer - Mobile Network
Tonga Communications Corporation
Tonga
• Managed O&M of IN, prepaid, and VAS platforms • Performed service provisioning and configuration • Conducted system health checks and preventive maintenance • Supported transition from transmission → core network systems • Performed troubleshooting and root cause analysis (RCA) • Assisted with system upgrades and vendor integrations
Technical Officer - International Maintenance Center Transmission & IN
Tonga Communications Corporation
Tonga
• Maintained transmission systems supporting international voice traffic • Supported connectivity from Earth Station to IMC • Monitored legacy transmission platforms and services • Assisted in troubleshooting and escalation of faults • Supported IN services for voice and signaling
Assistant Technical Officer - International Maintenance Center Transmission
Tonga Communications Corporation
Tonga
• Supported O&M of transmission systems and Earth Station infrastructure • Worked with RAD (DACS), MUX, modems, and fiber transmission systems • Supported analog and digital transmission (coax, Ethernet, fiber) • Assisted in installation, monitoring, and preventive maintenance • Performed basic troubleshooting and fault reporting
Education
The University of the South Pacific
Sione Folaumoetu'i Likiliki's Contact Information
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