Advisory Ambassador of International Relations, Gyeongsangbuk-do Province, South Korea (September. 2012)
Consul-General, Korean Consulate General in Istanbul, Turkey (November. 2009)
Secondment to the Presidential Office (Protocol Secretary Office) (March. 2008)
Secondment to the Presidential Transition Committee, Korea (December, 2007)
Deputy Chief of Protocol, Preparatory Office for the Asia Cooperation Dialogue Foreign Ministers’ Meeting (February. 2007)
Consul, Korean Consulate General in New York, U.S.A. (December. 2003)
Director for Protocol DivisionⅠ(January, 2002)
First Secretary, Korean Embassy in the French Republic (December, 1998)
Consul, Korean Consulate General in Ho chi minh City, Vietnam (June, 1993)
Second Secretary, Korean Embassy in the Kingdom of Belgium (June. 1990)
Visiting Professor, Northwest University, Xi'an Pei Hua University|2014
Visiting Professor, Wei Nam Normal University|2012
Consul General, Korean Consulate General in Xi'an, China|2011-2015
Deputy Consul-General, Korean Consulate General in Shenyang, China|2009-2011
Consul, Korean Consulate General in Shanghai, China|2006-2009
Deputy Consul-General, Korean Consulate General in Vancouver, Canada
Director, Public Relations Division, Cultural Affairs Bureau, Ministry of Foreign Affairs and Trade(MOFAT)|2001-2002
First Secretary, Korean Consulate General in Auckland, New Zealand|1997-2001
Second Secretary, Korean Embassy in the People's Republic of China|1992-1997
Chairman, The Association of Korean Exhibition Industries (AKEI)|2010-2012
Director of the Board, The Global Association of the Exhibition Industry (UFI)|2010
Director of the Board, Asian Federation of Exhibition and Convention Associations (AFECA)|2009-2011
CEO & President, Daegu Exhibition and Convention Center (DEXCO)|2006-2011
Director, KOTRA North America head office, Russia and CIS head office|2001-2005
Executive Vice President and a Director of the Board, Korea Trade-Investment Promotion Agency (KOTRA)|2003-2005
Director, KOTRA Overseas offices in New York (U.S.A.), Moscow (Russia), Helsinki (Finland) London (U.K.), Jedda (Saudi Arabia) Kuala Lumpur (Malaysia), Warsaw (Poland)|1976-2005
Secretary-General, The Association of Northeast Asia Regional Governments (NEAR)|2006-2011
Executive Committee Member, UNDP|2007-2011
Division Chair, Division of Administration and Culture, Committee on the Development of Gyeongsangbuk-do Province for the 21st Century|1995-2006
President, Research Institute of Politics and Society|1991-1993
Visiting Professor, Hosei University, Japan|1985-1987
Visiting Research Professor, University of California, Berkley, U.S.A.|1975-1980
Honorary Professor, Dean, and Professor, Teacher’s College of Daegu University
Reporter and Editorial writer, Daegu Maeil Newspaper|1964-1973