Ambassador, Permanent Representative of Viet Nam, New York, Mission of the Socialist Representative of Viet Nam since 1988. Director, Spokesman, Ministry of Foreign Affairs, Viet Nam, 1984-1988. Ambassador of Viet Nam to Indonesia, 1981-1984.
Director, Department of South-East Asia, 7781, Deputy Director, Department of Press & Information, 1973-1977, Ministry of Foreign Affairs. Counsil, Embassy of Viet Nam to India, 1969-1973. Head of Division, Department of Press & Information, Ministry of Foreign Affairs, 1964-1969.
First Secretary, Cons, Consul General of Viet Nam to Myanmar, 1960-1964.