Nguyen Duc Hung was the Ambassador of the Socialist Republic of Vietnam to Singapore from 1996 to 1999 and to Canada from 2006 to 2010. He joined the Vietnam Ministry of Foreign Affairs as a career diplomat in 1973. While working at the MOFA headquarters in Hanoi, he held different positions as Chief of Staff, Assistant Minister, Chief of Advisory Board to the Ministerial Leadership, Assistant Minister, and Director General of the Americas Department. From 2010 to 2012, he was appointed as Ambassador, Governor for Vietnam in the Asia–Europe Foundation (ASEF), and from 2012 till now, he works as Senior Advisor for Strategic Studies, Diplomatic Academy of Vietnam, MOFA.