Country: Ghana
Tenure: 1997-2006
Biography: http://www.un.org/News/ossg/sg/pages/sg_biography.html
Current Positions:

Secretary-General of the United Nations (1997-present)

Past Positions:

Served as the UN Secretary General’s Special Representative to the former Yugoslavia (1995-1996)
UN Under-Secretary-General (March 1993-December 1996)
Assistant Secretary-General for Peacekeeping Operations (March 1992-February 1993)
Assistant Secretary-General for Programme Planning, Budget and Finance, and Controller (1990-1992)
Assistant Secretary-General for Human Resources Management and Security Coordinator for the […]

Country: Egypt
Tenure: 1992-1996
Biography:http://www.un.org/News/ossg/sg/stories/boutros_bio.asp
Current Positions:

Chairman, Egyptian Human Rights Council (2004-present)
President of the Institute for Mediterranean Political Studies, Club de Monaco (2002- )
Chairperson of the International Panel on Democracy and Development, UNESCO (1997- )

Past Positions:

Secretary-General of the International Organization of the Francophonie (1998-2002)
President of the Society for International Development (1997-2000)
Secretary-General, United Nations (1992-1996)
Deputy Prime […]

Country: Peru
Tenure: 1982-1991
Biography: http://www.un.org/News/ossg/sg/stories/decuellar_bio.asp
Current Positions:

Retired

Past Positions:

Peruvian Ambassador to France (2001-2004)
Appointed Peruvian Prime Minister by interim president Valentin Paniagua (2000)
Secretary-General, United Nations (1982-1991)
Acted as the Secretary-General’s Personal Representative on the situation relating to Afghanistan (1981)
Legal Adviser in the Ministry of Foreign Affairs in Peru (1981)
UN Under-Secretary-General for Special Political Affairs (1979)
Special Representative of the […]

Country: Austria
Tenure: 1972-1981
Biography: http://www.un.org/News/ossg/sg/stories/waldheim_bio.asp
Past Positions:

President of Austria (1986-1992)
Austrian Permanent Representative to the United Nations, a post he held until he was appointed Secretary-General (October 1970)
Chairman of the Safeguards Committee of the International Atomic Energy Agency
Federal Minister for Foreign Affairs of Austria (January 1968-April 1970)
President of the first United Nations Conference on the Exploration and Peaceful […]

Country: Myanmar (Burma)
Tenure: 1961-1971
Biography: http://www.un.org/News/ossg/sg/stories/thant_bio.asp
Past Positions:

UN Secretary-General (1961-1971)
Permanent Representative of Burma to the United Nations (1957-1961)
Chairman of the United Nations Congo Conciliation Commission and Chairman of the Committee on a United Nations Capital Development Fund (1961)
Vice-Presidents of the Assembly’s fourteenth session (1959)
Executive Secretary of Burma’s Economic and Social Board, Myanmar (Burma) (1955)
Secretary for projects in […]

Country: Sweden
Tenure: 1953-1961
Biography: http://www.un.org/News/ossg/sg/stories/hammarskjold_bio.asp
Current Positions:
Past Positions:

UN Secretary-General (1953-1961)
Acting Chairman of Sweden’s delegation to the Seventh General Assembly in New York (1952-1953)
Vice-Chairman of the Swedish Delegation to the Sixth Regular Session of the United Nations General Assembly in Paris (1951-1952)
Vice-Chairman of the OEEC Executive Committee
Joined Swedish Cabinet as Minister becoming the Deputy Foreign Minister (1951)
Chairman […]

Country: Norway
Tenure: 1946-1952
Biography: http://www.un.org/News/ossg/sg/stories/trygvelie_bio.asp
Past Positions:

Mediator of the border dispute between Ethiopia and Italy, over the former Italian colony, Somalia (1959)
Chairman of Norway’s Board of Energy
Governor of Oslo and Akershus (1955)
UN Secretary-General (1946-1952) - elected the first Secretary-General of the United Nations (1 February 1946)
Chairman of the Norwegian delegation to the United Nations General Assembly […]