Technical Expert, Connectivity & Wireless - VOLKSWAGEN Group Technical Representative Tokyo(VTT)

• Dec 2021 - Present

MAKING A CAR "CONNECTED"System Integration and Validation of Infotainment system for VW brand/cars-Whole system-Online connectivity & Web application-UE/eSIM provisioning-HMI(Human Machine Interface)-Navigation(incl. online function)Support debugging activities and report errors and diagnosis resultMaintain and troubleshooting of test environment(Test vehicles, test benches)Communicate with functional owners and developers for reporting issue and joint testingTechnical Coordinator role for In-car function(Software) development project

Infotainment Technical Engineer - VOLKSWAGEN Group Technical Representative Tokyo(VTT)

• Apr 2020 - Nov 2021

Engineer - Customer Support

• May 2019 - Jan 2020

[Technology area]-4GLTE/5GNSA Mobile Packet Core; EPC - Evolved Packet Core; MME, S-GW, P-GW, SAEGWCharging services/entities in packet core network; PCRF, OCS, CGF-3GPP TS 2x.xxx-Cloud & Virtualization[Product]-Cisco's EPC product(StarOS relevant) - ASR5k series, QvPC-SI/DI(Virtual Packet Core)[Role and Responsible]-Tier2 technical support for MNO and MVNO in Japan; troubleshooting, investigation, lab reproduction, Q&A for product specification, training [Technology area]-4GLTE/5GNSA Mobile Packet Core; EPC - Evolved Packet Core; MME, S-GW, P-GW, SAEGWCharging services/entities in packet core network; PCRF, OCS, CGF-3GPP TS 2x.xxx-Cloud & Virtualization[Product]-Cisco's EPC product(StarOS relevant) - ASR5k series, QvPC-SI/DI(Virtual Packet Core)[Role and Responsible]-Tier2 technical support for MNO and MVNO in Japan; troubleshooting, investigation, lab reproduction, Q&A for product specification, training

Field Application Engineer - Pre/Post Sales Technical Support

• Sep 2018 - Dec 2018

Aeroflex Japan KK, a VIAVI Solutions company(Wireless Business Unit)-Pre/Post Sales Technical Support for UE simulator product(TM/E500)-Solution Management/Architect, NPI of the latest 4G technologies(LTE-A, IoT) Aeroflex Japan KK, a VIAVI Solutions company(Wireless Business Unit)-Pre/Post Sales Technical Support for UE simulator product(TM/E500)-Solution Management/Architect, NPI of the latest 4G technologies(LTE-A, IoT)

Technical Lead Engineer - Customer Service

• Feb 2018 - Aug 2018

Technical support for LTE Small Cell products(Indoor/Outdoor base station)-Leading local support(Tier2) team for providing technical services(Integration, Troubleshooting, Investigation, Q&A of products)-Set up Customer Support flow(SLA, workflow) based on support contract-Acting Technical Project Manager role for verification project at customer's lab Technical support for LTE Small Cell products(Indoor/Outdoor base station)-Leading local support(Tier2) team for providing technical services(Integration, Troubleshooting, Investigation, Q&A of products)-Set up Customer Support flow(SLA, workflow) based on support contract-Acting Technical Project Manager role for verification project at customer's lab

ICT Engineer - Test Environment E2E Support

• Apr 2015 - Jan 2018

-Service delivery, technical support, integration and trouble shooting for whole network in test bed(especially LTE RAN, UE(Android smartphone/Qualcomm MTP/iPhone), SIM card(GEMALTO/SmartJack products), RF Engineering, WCDMA RAN, additionally EPC, IMS, 3GPS/CS Core)-STP(System Test Plant) Support for external customer(MNO in Japan) ;Troubleshooting, Q&A of product specification, Test configuration management and Training-Solution architect and technical coordinator role for developing Test Automation Platform

Support Engineer - RAN Customer Network Support

• Aug 2011 - Oct 2014

-Handling Customer Support Request(CSR) regarding investigation for radio network troubleshooting-Handling tasks for HW quality improvement -Handling Customer Support Request(CSR) regarding investigation for radio network troubleshooting-Handling tasks for HW quality improvement