• To plan and carry out Network Expansion activities. SW maintenance activities such as installation and test of technical/change notes/change deliveries/change request. • To carry out technical/customer acceptance testing. Technical support tasks including fault diagnosis and troubleshooting within won competence area. • To participate in fault management and/or help-desk activities that comply to certain SLAs or KPIs • To participate in emergency support activities. • To work closely with other department in order to provide technical support or recommendations to improve network quality • To identify and make recommendations to ensure the availability of the CS Core Network elements through design, traffic/risk analysis, modification, and communication with vendors and implementers. • To perform hardware and software installation, commissioning in the area of Core Network and any kind integration with Core Network. • Accountable for IMS network domain in operational area as well as development. • Manage end to end integration on IMS network component. • Provide technical support to international business such as VoIP, A2P ensure quality service and new partners deployment. • To be available standby for 24/7 including weekend or holiday for own standby schedule. • Complete all other activities assigned by the supervisor as per management decision.

• Bachelor degree in Telecommunication, IT, Electrical and Energetic Engineering. • Minimum three (3) to four (4) years work experience in relevant fields. • Strong understanding knowledge in GSM/UMTS Core Network fundamentals, theories, and operations. • Strong understanding knowledge in Packet Core and IP Core fundamentals and opera-tions.