03/1996- Present: Professor, University of Seoul
Previously, Senior Researcher, Korea Institute of Machinery & Materials
1994-95 : Visiting Scholar, Osaka University, Japan
2003-04 : Visiting Professor, University of Waterloo, Canada
2010-12 : Visiting Professor, University of Greenwich, UK
2010-Present : Editor, Korea Microelectronics and Packaging Society
2017-2019 : President, Korea Microelectronics Packaging Association
2011-2012 : Chair of Academic Committee, Korea welding and joining society
2013-2014 : Vice-Editor-in-Chief, Korea welding and joining society
2003-Present : Director of Korea micro-electronics and packaging society
1996-2014 : Director of Korea welding and joining society
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