Assistant Maintenance Manager

In this position, you will : Manage and oversee all Support and Maintenance Services activities about Core Network domain System / RAN / MCX, ensuring full compliance with contract Service Levels. Take full responsibility for all Core Network / RAN / MCX maintenance issues, from fault receipt through to resolution and closure, ensuring all Critical, Major, Minor and General Inquiry faults are resolved within required timeframes.

Provide 7×24 on-site technical support for network incidents escalated from Maintenance Support Specialists and/or the client, including complex core network failures, signaling issues, service disruption, interworking problems, and capacity-related issues. Identify and propose resolutions for all network technical problems, including root cause analysis of recurring core faults, KPI degradation, capacity bottlenecks, and interoperability issues with external networks.

Oversee network preventive maintenance execution and compliance with the Maintenance Plan. Manage network system upgrades, patch deployments, service feature activations, rectifications, and capacity expansions, coordinating with multiple parties. Lead network disaster recovery management, including disaster recovery plan maintenance, drill execution, and ensuring core network resilience and recovery capability for mission critical police operations.

Ensure network documentation compliance including incident records, maintenance reports, O&M manual updates, OAM procedures, configuration records, capacity planning studies, and monthly maintenance services reports. Provide technical mentorship and guidance to Network Maintenance Support Specialists and client In-house Maintenance Team, building tier-1 and tier-2 core network technical capability through training and mentorship programs.

To be successful in this position, you should meet the following requirements: Possess at least one Bachelor’s degree in Electronics or Telecommunications or Information Engineering or equivalent. At least 5 years of operation, administration and maintenance hands-on experience in Dedicated Core Network systems/RAN/MCX.

Experienced in deploying 4G or 5G technologies, e.g., 5GC, IMS core, signaling, and core network element operation and troubleshooting Good Command of written & spoken English, Cantonese and Mandarin. Strong analytical and problem-solving skills, with proven ability to identify root causes and propose effective resolutions for complex network technical problems.

Strong knowledge of Network Operations & Maintenance (O&M) procedures Proven experience managing and overseeing Network maintenance activities, including remedial and preventive maintenance programs. Proficient in Network system upgrades, capacity expansion planning, and cross-party coordination. Experienced in managing Network documentation, maintenance reporting, capacity planning, and ensuring OAM and contractual compliance.

Ability to provide 7×24 on-site technical support for escalated Network incidents and guide Maintenance Support Specialists and in-house staff in complex troubleshooting. Experience with dedicated networks for public safety or mission critical communications is preferred.