Job Description

Purpose:

• Provide technical and operational support for 4G/5G Mobile Core nodes (nTAS/MSS/SBC/CFX/HSS/HLR/OneNDS/UDM/AUSF/FW) and International Roaming related service support.

Responsibilities:

• Perform daily operation and administration of 4G/5G Mobile Core nodes (nTAS/MSS/SBC/CFX/HSS/HLR/OneNDS/UDM/AUSF/FW) and ensure smooth network operation.

• Carry out system maintenance activities eg patch installation to improve system performance, system release upgrade.

• Develop and review system operations processes, update network and operational documents to ensure operation effectiveness.

• Perform system security hardening, vulnerability assessment, and implement the necessary corrections/ processes to mitigate security risks.

• Perform proactive monitoring of network service KPIs/ alarms and performance analysis to ensure service quality level.

• Perform service troubleshooting and testing with local service providers and overseas roaming partners. 

Qualifications

Requirements:

• Appropriate qualification in Electronics/ Communications/ Networking or equivalent

• Good technical knowledge of Mobile 4G/ 5G Core network and related service/ call flows and associated protocols (IMS/VoLTE/SS7/Sigtran/Diameter/SIP/SCTP)

• Ability to perform end-to-end network service troubleshooting

• Working knowledge of VoLTE roaming and IREG related testing

• Working knowledge of Network and Application Securities

• Working knowledge of IP switching and routing protocols

• Working knowledge of Linux and VM

• Basic proficiency in programming and scripting skills

• Willing to perform late night maintenance during maintenance window period for release/ upgrade/ software patch installation and project cutover