He is a Professor in the Department of Ocean System Engineering, Jeju National University since 2006.

He was a Visiting Professor at the Georgia Institute of Technology, during 2017-2018.

He worked as a Technical Advisor at SK Telesys Co., Ltd., Korea, during 2005-2006.

He served as an Assistant Professor in the Department of Electronic Engineering, Seokyeong University, during 2003-2006.

He received a Ph.D in Electrical and Electronic Engineering from KAIST in 2002.

He was a Visiting Researcher at Stanford University in 1998.

He was a Senior Researcher at the Electronics and Telecommunications Research Institute (ETRI) from 1990 to 1995.

He was a Ph.D. candidate in Electrical and Computer Engineering at the University of Wisconsin-Madison from 1987 to 1989.

He received an M.S. in Engineering from Michigan Technological University, USA in 1987.

He received a B.S. in Electronic Engineering from Hanyang University in 1985.