September 2018 | Present

• Deputy Prime Minister, Minister of Foreign Affairs and International Cooperation.

April 2016 | September 2018

• Senior Minister, Minister of Foreign Affairs and International Cooperation
• Chairman of the National Coordination Committee for UN-Peace Keeping Operations Mission
• Chairman of Information Research and Analysis Group of the Office of the Council of Ministers.

September 2013 | April 2016

• Minister of Posts and Telecommunications
• Vice-President of the Cambodian Mine Action and Victim Assistance Authority (CMAA)
• Chairman of the National Coordination Committee for UN-Peace Keeping Operations Mission
• Chairman of Information Research and Analysis Group of the Office of the Council of Ministers.

December 2011 | 2012

• President of the Eleventh Meeting of States Parties to the Anti-personnel Mine Ban Convention (11MSP)

2009 | 2013

• Minister Attached to the Prime Minister
• Advisor to the Prime Minister
• Secretary of State of the Office of Council of Ministers
• Vice-President of the Cambodian Mine Action and Victim Assistance Authority (CMAA)
• Chairman of the National Coordination Committee for UN-Peace Keeping Operations Mission

2004

• Advisor to the Prime Minister
• Secretary of State of the Office of Council of Ministers
• Second Vice-President of CMAA
• Chairman of the National Coordination Committee for UN-Peace Keeping Operations Mission

2003

• Advisor to the Prime Minister
• Deputy Secretary-General of the Royal Government of Cambodia

1999

• Ambassador to France, Belgium, Holland, Austria, Denmark, Sweden, Finland, EU and the Office of the UN in Geneva

1993 | 1998

• Advisor to the Prime Minister

1993

• Spokesman of the Royal Cambodian Armed Forces  (RCAF)
• Chief of the Army‘s Information Service

1986 | 1992

• Deputy Editor-in-Chief of the Army Newspaper

1979 | 1986

• Journalist of the Army Newspaper

1979

• Entry into Army Service