- Overall company operations- Buying and selling used cars- Inventory and vehicle maintenance management

- Enterprise Femto Cell: Lunched and commercial service in Sprint network, Trial with East Asia Telecom companies.- Consumer Femto Cell: Prepare to commercialize in Sprint Network.- LTE project: Performed detailed system design of consumer Femto eNB. - WCDMA project: System integration test for SFR.

Software developer in the Wireless CDMA OA&M group writing code, design and development for software modules of IP-BS based on 1xRTT system (BSM, BSC, BTS).- Sprint Femto BS project: TR-069 Client, Auto Configuration System, Femto data model - Verizon project: Lunched and commercial service of Hopping Pilot Beacon- India Tata project: IOS with ZTE Switch, PDSN system for voice and data service in India. - Launched commercial service in lots of small wireless service provider in US: Appalachian, Hamilton, Cellcom, Leaco, PineBelt, Tecore, etc. - Performed design, develop BSM North Bound Interface (SNMP).- Designed & developed software O&M modules of the EVDO Rev-A system

Lead a team of software developer on the design, writing code, testing of CDMA2000 Base Station system of US market for a high-reliability.- Sprint-PCS project: Problem fixing in configuration, statistics, and loading blocks in accordance with customer request.- Train software engineers to continue CDMA2000 project in United States. - Performed high-level design of Cyclone BTS (CDMA2000 micro-Base Transceiver Station). - Optimized Samsung CDMA2000 Base Station System (BSM, BSC, BTS), which is deployed in Sprint Puerto Rico site

Software developer in the Wireless System Development group writing code for a high-reliability, real-time, embedded cellular telecommunications system.- Designed & developed configuration DCS800, PCS1900, and PCS1800 after in-depth standard research.- Designed and developed Configuration and Resource Management Software by adopting PLD (Program Loading Data) structure. - Developed and coded Air Message Management by way of overhead channel under IS-95 Standard basis. - Developed Pico-BTS in CDMA Version III System, PCS1800, DCS800.- Deployed DCS system (800 MHz) for SKT and STI- Launched commercial service in KTF and Hansol (PCS1800) and took follow-up actions for bug fix and field optimization. - Performed Australia and China Customer Requirements Research and joined opening up commercial service

- Designed & developed system network for overseas call service.- Wrote technical documents in overseas call service plan.- Designed toll switch and transfer network