Hans Blix studied at the University of Uppsala, at Columbia University, and at Cambridge University, where he received his doctorate. At Stockholm University, he attained a doctorate in law and served as a professor in international law. From 1963 to 1976, he served in the Swedish foreign ministry, and in 1978, he became Sweden's Minister for Foreign Affairs. From 1981 until 1997, he served as Director General of the International Atomic Energy Agency. In 2000, the UN Secretary General appointed Hans Blix to his present position as head of the United Nations Monitoring, Verification, and Inspection Commission (UNMOVIC).
He has written several books on subjects associated with international and constitutional law. He received an honorary doctorate from Moscow State University in 1987 and the Henry de Wolf Smyth Award in 1988. In 1997, he was awarded the Gold Medal for distinguished service in the field of nuclear affairs by the Uranium Institute, the predecessor to the World Nuclear Association. In 2001, he became Honorary Chairman of the World Nuclear Association.