He is currently Dean of Education 3.0 Initiative for teaching and learning innovation at KAIST (Korea Advanced Institute of Science and Technology), Korea. He is also a full professor and department head at Department of Industrial & Systems Engineering, KAIST. He got B.S. from Seoul National University (1980), M.S. from KAIST (1982), and Ph.D. from Ohio State University (1991), all in Industrial Engineering. He joined KAIST in 1991. He served for Director of Library and Information Systems in KAIST during 2000~2001. He was a founding director of NDSL(National Digital Science Library) in 2001. He also served for National Presidential Committee on Deregulation during 2010-2011 and is a member of University Restructuring Committee for Minister of Education and Science in Korea.His interests include educational innovation, modeling and scheduling of discrete event dynamic systems and robotized manufacturing systems for semiconductor manufacturing, and modeling & simulation of complex engineering systems. He was an associate editor of IEEE Transactions on Automation Science and Engineering (2004~2008) and an advisory board member for OR Spectrum journal, and served as a vice president, a journal editorial board member, and a journal editor for KIIE or KORMS.