- 2013.3.1 - PresentDepartment of Multimedia Engineering, Dongguk University , Seoul , KOREA
- 1993.9.1 - 2013.2.28Department of Computer Engineering, Wonkwang University , Iksan , KOREA
- Teaching Data Structure, Computer Algorithm, Web Programming and Object-Oriented Programming.
- Researching Distributed and Parallel Computing on Internet,
- Grid Computing, Mobile Computing,
- Semantic Grid
- USN Middleware
- 2004.1 - 2004.12.Dept. of Electrical and Computer Engineering, Wayne State University , Detroit , MI 48202 , USA
- 1997.1 - 1997.12.Dept. of Computer Science and Engineering, Michigan State University , East Lansing , MI 48824, USA
- 1989 - 1993Department of Computer Science and Engineering , Korea University, Seoul KOREA
- Teaching Programming Languages, Data Structure, Computer
- Algorithm & Compiler, Object - Oriented Programming, Web Programming etc ..