23 October 2021 | Present

• Secretary of State, Ministry of Foreign Affairs and International Cooperation

June 2018 | 23 October 2021

• Ambassador Extraordinary and Plenipotentiary of the Kingdom of Cambodia to the United State of America

May 2015 | January 2018

• Under Secretary of State, Ministry of Foreign Affairs and International Cooperation

October 2008 | April 2015

• Ambassador to the Commonwealth of Australia and to New Zealand

2006 | 2008

• Director of Personnel Department, Ministry of Foreign Affairs and International Cooperation

2004 | 2006

• Ambassador to the Republic of Latvia, the Republic of Lithuania, and the Republic of Estonia with residence in Moscow

2003 | 2006

• Ambassador to the Russian Federation

1999 | 2003

• Director of Information Department, Ministry of Foreign Affairs and International Cooperation

1998 | 1999

• Deputy Director, America Department, Ministry of Foreign Affairs and International Cooperation

1995 | 1998

• First Secretary, Royal Embassy of Cambodia to USA

1993 | 1995

• Assistant to Under Secretary of State, Ministry of Foreign Affairs and International Cooperation

1989 | 1993

• First Secretary, Cambodian Embassy to Bulgaria

1985 | 1989

• Personnel Department Official, Ministry of Foreign Affairs and International Cooperation

1980 | 1985

• Press Department Official, Ministry of Foreign Affairs and International Cooperation