Doctor of Philosophy, Ohio State University, Columbus, 2007.
Graduate research associate Korea Advanced Institute of Science Technology, Daejon, 1999—2001. Assistant researcher LG Electronics Institute of Technology, Seoul, Republic of Korea, 2001—2002. Graduate research associate Ohio State University, 2002—2007.
Senior engineer Samsung Electronics Company Ltd., Hwasung, Republic of Korea, since 2007. Administrative service, 1994-1995, Andong.