- Education
1977 B.A in Political and International Relations, Konkuk University, Seoul, Korea
1979 M.A in Strategic Studies, University of Aberdeen, United Kingdom
1981 Ph.D. in Political Science and International Relations, London School of Economics and Political Science (LSE), United Kingdom

- Career
1981-1983 Research Fellow, Center for International Affairs(CFIA), Harvard University, U.S.A
1983-1992 Professor, National Defence College
1993-1995 Special Advisor in charge of Security and Unification, National Security Planning Agency
1995-1998 Deputy Secretary-General, National Unification Advisory Council
1998-2002 Professor, Graduate School of Unification and Security, Kyonggi University, Seoul, Korea
2002-Present Professor, Graduate School of Politics and Policy, Kyonggi University, Seoul, Korea
2003-2005 Dean, Graduate School of Politics and Policy, Kyonggi University, Seoul, Korea
2007-2008 Senior Advisor, Political Sub-Committee, the 17th Presidential Transition Committee
2010 Ambassador for International Security Affairs, Ministry of Foreign Affairs and Trade(MOFAT)
2011-2012 Korean Ambassador to Canada
2012-2013 Deputy Director, National Intelligence Service