'13.3. - now
UNIST, School of Nano-Bioscience and Chemical Engineering, Ulsan, Korea, Full(13) Professor
'86.9. - 2013.2.
POSTECH, Department of Chemical Engineering, P.O. Box 12, Pohang, Korea, Assistant (86), Associate(90), and Full(96) Professor
'93.8. - '94.7.
Yale University, Department of Chemical Enginering, Visiting Professor
'87.2. - '93.2.
Lucky Ltd., Technical Advisor
'90.5. - now Samsung Petrochemical Co., Technical Advisor
'85.10. - '86.9.
Catalytic Associates, Inc., Mountain View, California 94043, U.S.A. Research Fellow (Research for the development of new chemical processes or products)
'84.10. - '85.10.
Stanford University, Dept. of Chemical Engineering, Stanford, California 940305, U.S.A. Postdoctoral. (Research in the preparation and catalytic applications of tungsten carbides)
'80.10. - '84.10.
Stanford University, Dept. of Chemical Engineering, Stanford, California 940305, U.S.A. Research Assistant. (Preparation, characterization and catalytic application of molybdenum carbides as a new catalytic material)
'75.3. - '80.8.
Samsung Petrochemical Co., Ulsan, Process Engineer