| 1975.03 - 1979.03 | B.S. in Dept. of Economics, Korea University, Korea |
| 1990.04 - 1993.02 | Ph.D. in Dept. of Computer Science, University of Tsukuba, Japan |
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| 1979.01 - 1987.02 | Senior Researcher, Korea Institute of Science and Technology(KIST) |
| 1993.02 - 1995.02 | Principal Researcher, SERI, KIST |
| 1995.03 - Now | Professor, Dept. of Computer Science & Engineering, Korea University, Korea |
| 2003.02 - 2004.01 | Visiting Professor, UCLA |
| 2000.10 - 2008.02 | Vice-Chairman, The Korea Computer Graphics Society(KCGS) |
| 2005.01 - 2006.03 | Director, Korean Institute of Information Scientists and Engineers |
| 2005.11 - 2008.01 | Dean of Korea University's College of Computer Information Communication |
| 2005.11 - 2008.01 | President, Korea University Computer Science and Technology School |
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| 2006.03 - 2009.04 | President, Brain Korea 21 - Korea University of Software Engineering |
| 2008.03 - Now | Chairman, The Korea Computer Graphics Society |
| 2009.01 - Now | Vice-Chairman, Korean Institute of Information Scientists and Engineers |