| Altmann, Dr. Georg | Georg Altmann (Dr. Georg Altmann) | Director | 1922 - 1928 | 3 | 1 |
| Almirante, M. | M. Almirante | Director | 1909 | 1 | |
| Andersen, Flemming Weiss | Flemming Weiss Andersen | Director | 1993 | 1 | 1 |
| Arstad, Lars | Lars Arstad | Director | 2006 | 7 | 1 |
| Arntsen, Ragnhild | Ragnhild Arntsen | Director | 2009 | 1 | |
| Andrejev, Aleksandar Ivanović | Aleksandar Ivanović Andrejev | Director | 1912 | 1 | |
| Albertsson, Kristján | Kristján Albertsson | Director | 1924 | 1 | |
| Antlitz, Horst | Horst Antlitz | Director | 1971 - 1973 | 3 | |
| Allen, Rae | Rae Allen | Director | 1977 | 1 | |
| Ascher, Tamás | Tamás Ascher | Director | 2007 - 2012 | 7 | 1 |
| Abe, Hirotsugu | Hirotsugu Abe | Director | 1978 | 3 | |
| Axer, Erwin | Erwin Axer | Director | 1979 - 1990 | 3 | 1 |
| Alexanian, Sophia | Sophia Alexanian | Director | 2014 | 1 | |
| Allen, Dennis | Dennis Allen | Director | 1983 | 1 | |
| Alba, Luz | Luz Alba | Director | 1945 | 1 | |
| Antoniadi, Koula | Koula Antoniadi | Director | 1985 | 9 | |
| Anderhub, Jean-Paul | Jean-Paul Anderhub | Director | 1983 | 2 | |
| Artemova, Larisa | Larisa Artemova | Director | 2008 | 1 | |
| Afrim, Radu | Radu Afrim | Director | 2014 | 1 | |
| Armour, Pauline | Pauline Armour | Director | 2013 - 2014 | 3 | |
| Anderson, Sarah Pia | Sarah Pia Anderson | Director | 1987 - 1994 | 3 | 1 |
| Atkinson, Clinton J. | Clinton J. Atkinson | Director | 1990 | 1 | 1 |
| Arday, Liz | Liz Arday | Director | 2012 | 1 | |
| Ansorg, Barbara | Barbara Ansorg | Director | 1990 | 1 | |
| Armfield, Neil, Geoffrey | Neil Geoffrey Armfield | Director | 1988 - 1991 | 2 | 1 |
| Andersson, Jöns | Jöns Andersson | Director | 1961 - 1991 | 3 | 1 |
| Avilez, Carlos | Carlos Avilez | Director | 1992 | 1 | |
| Alonso, José Luis | José Luis Alonso | Director | 1982 | 3 | |
| Albert, Richard | Richard Albert | Director | 1991 | 1 | 1 |
| Altenbeck, Detlef | Detlef Altenbeck | Director | 1994 - 2005 | 2 | 1 |
| Aguilera, Carlos | Carlos Aguilera | Director | 1994 - 1997 | 2 | |
| Arbenz, Mary | Mary Arbenz | Director | 1967 | 1 | |
| Ankermann, Martin | Martin Ankermann | Director | 1965 - 1967 | 2 | |
| Abenius, Folke | Folke Abenius | Director | 1966 | 1 | |
| Antunes, Ruy | Ruy Antunes | Director | 1966 | 1 | |
| Arlt, Erwin | Erwin Arlt | Director | 1965 | 1 | |
| Apprich, Wolfram | Wolfram Apprich | Director | 2000 - 2014 | 16 | |
| Achramkova, T. | T. Achramkova | Director | 2002 | 1 | |
| Alexander, Bill | Bill Alexander | Director | 2002 | 1 | |
| Armour, Norman | Norman Armour | Director | 2002 | 1 | |
| Alföldi, Róbert | Róbert Alföldi | Director | 2012 - 2018 | 2 | |
| Augustín, Juraj | Juraj Augustín | Director | 2013 | 1 | |
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