· Performed cabinet expansion, system installation, commissioning, integration, configuration, upgrade, and maintenance for circuit switch (CS) core network for Asia Pacific Telecom (APT) & Taiwan mobile (TWM)· Strong CS Core network elements experience: MGCF/oMSS/oTAS/oMGW/oBGW/HSS/HLR/OneNDS· Excellent ability at diagnostic and troubleshooting end to end network issue (IP, SS7, Sigtran, diameter, LDAP, SIP) and handled cases for SDM (HSS/ HLR/ OneNDS) and IMS products· Conducted network planning optimization (NPO) and KPI analysis· Multi-Vendor-integration with Ericsson for core expansion project· Prepared, reviewed and implemented SOP / MOP· 5G SA/NSA core upgrade and integration · Deployed TWM FMC (fixed mobile convergence) core network in cloud-based VNF (openstack platform) with ChangHwa Telecom (CHT) new-generation network (NGN) team· Migrated Huawei SSX to FMC core for Customer Premises Equipment (CPE)

· Evaluated, analyzed and introduced a novel B2B business model - Business Resource Integration system and technically supported the front-end and back-end development. · Survey and analyzed different airline resource supplier ’s policy and API rule

· Perform CS Core device (MGCF/TAS/oMGW/oBGW/HSS/HLR/OneNDS) Project related task· Care maintain circuit switch core job· Diagnostic and Troubleshooting end to end network issue (SS7, diameter, LDAP, SIP)· Tuning performance and Data KPI analysis · System commissioning, integration and upgrading· Multi-Vendor-integration with Ericsson· Case handle for SDM (subscriber data management)· MOP prepare, review and implement with customer· 2014 Ambit VoLTE project commissioning and integration.· 2015 care maintain circuit switch core job (MGCF/TAS/oMGW/oBGW)· 2016 care maintain circuit switch core job (HSS/HLR/OneNDS)· 2017 SDM expansion project 1.5Mto2M(HSS/HLR/OneNDS) & ITRI project upgrading (MGCF/oMGW)· 2018 expansion project (HSS/HLR/OneNDS) & Ericsson 2G core integration (multi-vendor integrate)· 2019 CS core upgrading (HSS/HLR/OneNDS)

· Outsourcing vendor consolidation· Product safety certification (Anatel for Brazil)· Allwinner / Rockchip / MTK solution tablet assembling production process· MTK solution Smart Phone / feature phone outsourcing and trading

· Embedded system firmware programming for WIMAX router· System kernel module import and installation· Shell script and Makefile programming· HTML/CSS/javascript for User interface