| # | Period | Company | Field / Divition | Note |
|---|---|---|---|---|
| 001 | 1997.11 ~ 2002.2 |
Samsung Software Membership | Server/Client System Embedded System | Support program for S/W experts by Samsung Electronics |
| 002 | 2002.3 ~ 2005.7 |
Changwahtech Co., Ltd. | Distributed Server System Embedded System | Researcher Regular employee |
| 003 | 2007.8 ~ 2009.2 |
SK Energy Co., Ltd. | Battery System for HEV, Battery Management System, Battery HILS | Researcher, Regular employee |
| 004 | 2009.8 ~ 2011.12 |
Top Smart(Own Private Company) | Engineering for the integration of battery system with a commercial vehicle from Mitsubishi Fuso in Japan | CEO Working on behalf of SK energy as a residential engineer in Japan |
| 005 | 2012.4 ~ 2013.8 |
National Institute of Advanced Industrial Science and Technology (Japan) | Smart Grid | Researcher (Regular employee) Associate Researcher |
| 006 | 2013.8 ~ Current |
Hanbat National University | Smart Grid Energy Management System | Assistant Professor |