Leaders of the Organization of American States (OAS)
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Note: the Organization of American States (OAS) was established on April 30, 1948.

Active names link to their correspondant biography at the CIDOB website.


Secretaries-general
Alberto Lleras Camargo            30 Apr 1948 - 31 Jul 1954 (+1999) Colombia 
Carlos Gregorio Dávila Espinosa   31 Jul 1954 - 19 Oct 1955 (+1955) Chile
William Manger                    19 Oct 1955 - 16 Jan 1956 (+1994) United States (acting)
José Antonio Mora Otero           16 Jan 1956 - 18 May 1968 (+1975) Uruguay
Galo Plaza Lasso                  18 May 1968 - 18 May 1975 (+1987) Ecuador
Alejandro Orfila                  18 May 1975 - 31 Mar 1984         Argentina  
Valerie T. McComie                 1 Apr 1984 - 20 Jun 1984 (+2007) Barbados (acting)
João Clemente Baena Soares        20 Jun 1984 - 20 Jun 1994         Brazil
Christopher R. Thomas             20 Jun 1994 - 15 Sep 1994         Trinidad and Tobago (acting)
César Augusto Gaviria Trujillo    15 Sep 1994 - 15 Sep 2004         Colombia  
Miguel Ángel Rodríguez Echeverría 15 Sep 2004 - 15 Oct 2004         Costa Rica
Luigi R. Einaudi                  16 Oct 2004 - 26 May 2005         United States (acting) 
José Miguel Insulza Salinas       26 May 2005 - 26 May 2015         Chile
Luis Almagro Lemes                26 May 2015 -                     Uruguay

Assistant Secretaries-general
William Manger                    30 Apr 1948 - 16 May 1958 (+1994) United States
William Sanders                   18 May 1958 - 18 May 1968         United States
Miguel Rafael Urquía              18 May 1968 -  7 Jul 1975         El Salvador
Jorge Luis Zelaya Coronado         7 Jul 1975 -  7 Jul 1980         Guatemala 
Valerie T. McComie                 7 Jul 1990 -  9 Jul 1990         Barbados
Chritopher R. Thomas               9 Jul 1990 -  5 Jun 2000         Trinidad and Tobago
Luigi R. Einaudi                   6 Jun 2000 - 18 Jul 2005         United States  
Albert R. Ramdin                  19 Jul 2005                       Suriname


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