Niculae Micu worked until the last days of his life. Hired by MAE in 1959, he was the first Permanent Representative of Romania to the Council of Europe. Over 1966 – 1970, Niculae Micu worked within the Permanent Mission of Romania to the United Nations in New York and over 1971 – 1974 he was a international clerk at the United Nations Organisations in New York.
Over 1992 – 1994 he held the position of Ambassador of Romania’s Consulate General with the Council of Europe, in Strasbourg. Within the MAE central office, he was head of the OSCE and UN department, over 1990-1992. He was a fluent speaker of English, French and Russian. Niculae Micu was one of the initiators of the Black Sea Economic Cooperation Organisation (BSEC) and had an essential contribution to Romania’s accession to the Council of Europe.