Mr. Thomas Stelzer has been a member of the foreign service of the Republic of Austria. He has served as Permanent Representative of Austria to the United Nations Office in Vienna, the International Atomic Energy Agency, the United Nations Industrial Development Organization, and the Comprehensive Nuclear-Test-Ban Treaty Organization Preparatory Commission; and more recently as Ambassador to Portugal. He also served as Assistant Secretary-General for Policy Coordination and Inter-Agency Affairs at the United Nations, and as the Secretary of the United Nations Chief Executives Board. At the Austrian Permanent Mission in New York, he had worked in the areas of international security and disarmament issues, as well as development cooperation. He was also Special Assistant to the Executive Secretary of the Comprehensive Nuclear Test-Ban-Treaty Organization (CTBTO PrepCom). Among his various other professional activities, Thomas Stelzer has also held the position of Deputy-Director of the Austrian Cultural Institute in New York. Before joining the Foreign Service, he worked as a free-lance journalist and political science researcher in Latin America. He has extensively lectured on the International System. Thomas Stelzer is holding degrees from Vienna University and Stanford University and a Diploma from The Johns Hopkins University, School for Advanced International Studies. He has been the president of Klangforum Wien, a leading ensemble for contemporary classical music.