Sergiu Celac was the first post-communist Romanian Minister of Foreign Affairs of Romania (December 26, 1989 – June 28, 1990) within the Romanian Provisional Government in the aftermath of the Romanian Revolution of 1989. Celac started working for the Ministry of Foreign Affairs of Romania immediately after graduation from the Faculty of Foreign Languages from the Bucharest University. By 1963 he received the rank of Attaché and in 1972 he was promoted to a rank of Counselor. From 1962 until 1967, he worked as the personal secretary to the First Deputy Minister of Foreign Affairs. In 1967-1969, he was a part-time secretary to the Foreign Minister on his trips overseas and during Romania’s presidency of the UN General Assembly. In 1968-1974, Celac served as Deputy Director and later Director of the Intelligence Analysis and Policy Planning Department. Throughout his career at the Ministry of Foreign Affairs, he was an expert and member of the Romanian delegation to 14 sessions of the UN General Assembly and Disarmament Committee in Geneva. Since August 2000, Celac is the chairman of EmC Emission Control Ltd. In January 2002, he was hired to be the President & CEO of the Romanian Institute of International Studies of Nicolae Titulescu ( IRSI). From 2002 to 2004, Celac served as Personal Adviser to the President of Romania. He was also the Alternate Director General at the International Center for Black Sea Studies in Athens in 2003-2007.In 1997 – 2002, he was an invited speaker at many conferences in United States, France, Belgium, United Kingdom, Germany, Italy, Luxembourg, Poland, Ukraine, Jordan, Israel, Turkey, Czech Republic, Greece, Slovakia, Switzerland, Georgia, Azerbaijan, Portugal, Austria, the Netherlands, Brazil. His publications include more than 40 fiction and non-fiction political science books, and more than 500 essays and articles. He also co-chairs the Millennium III Quarterly Learned Journal. Currently, Celac is the Senior Adviser at National Center for Sustainable Development, Vice President of Romanian Association for the Club of Rome and Associate Professor at the Romanian Diplomatic Institute. In 2000, Celac was awarded with the Grand Officer of the National Order for Faithful Service.