| May 1978 |
- Passed High Diplomatic Service Examination
|
| Aug. 1978 |
- Joined the Ministry of Foreign Affairs(MOFA)
|
| Feb. 1981 |
- Second Secretary, Korean Embassy in the United States of America
|
| Mar. 1984 |
- Assistant Secretary, Office of the President
|
| Apr. 1986 |
- Second Secretary, Korean Embassy in the Republic of India
|
| Dec. 1991 |
- First Secretary, Korean Embassy in the United States of America
|
| Feb. 1995 |
- Director, North America Division I, American Affairs Bureau, MOFA
|
| Aug. 1996 |
- Assistant to the Foreign Minister
|
| Dec. 1996 |
- Deputy Consul-General, Korean Consulate General in San Francisco, U.S.A.
|
| Feb. 1999 |
- Director for Personnel, Office of Planning and Management, Ministry of Foreign Affairs and Trade(MOFAT)
|
| Jul. 2000 |
- Consul-General, Korean Consulate General in Toronto, Canada
|
| Aug. 2003 |
- Senior Research Officer, Department of American Studies, Institute of Foreign Affairs and National Security(IFANS), MOFAT
|
| Feb. 2004 |
- Director-General, North American Affairs Bureau, MOFAT
|
| Jul. 2006 |
- Ambassador for Public Diplomacy on Korea-U.S. Relations
|
| Jan.2007 |
- Ambassador, Advisor for International Relations to Jeju Special Self-Governing Province
|
| Apr. 2008 |
- Special Representative for Korean Peninsula peace and Security Affairs, MOFAT
|
| Feb. 2009 |
- First Deputy Director, National Intelligence Service(NIS)
|
| May 2011 |
- Ambassador Extraordinary and Plenipotentiary to the United Nations
|