1988 - 1995 Associate Professor (with Tenure), Texas A&M University, U.S.A. 1995 - 2000 Professor, Department of Political Science, Sookmyung University, Seoul, Korea 2000 - 2008 Professor, Department of Political Science, Yonsei University 2006 - 2008 Director, Institute of East & West Studies, Yonsei University 2008 - 2011 Ambassador Extraordinary and Plenipotentiary to the Commonwealth of Australia