| Name | Functions | Event Dates | Events | Resources  | ||
|---|---|---|---|---|---|---|
| Göran Arfs | Designer | 1980 | 1 | |||
| Wendy Almeida | Actor | 1980 | 1 | |||
| Sointu Angervo | Actor | 1980 | 1 | |||
| Michael Authenrieth | Actor | 1980 | 1 | |||
| Bob Anderson | Actor | 1980 | 2 | |||
| Walter Anders | Adaptation | 1980 | 1 | |||
| Clara Adams | Actor | 2000 | 1 | |||
| Susan Aderin | Actor | 2000 | 1 | |||
| Kolade Agboke | Actor | 2000 | 1 | |||
| Günther Allgeier | Designer | 1980 | 1 | |||
| Corinna Agustoni | Actor | 1994 - 1996 | 2 | |||
| Roberto Anglisani | Actor | 1994 - 1996 | 2 | |||
| Marichilene Artisevskis | Costume Designer | 2011 - 2024 | 2 | |||
| Csaba Antal | Designer | 1994 - 2002 | 23 | |||
| Roberto Accornero | Actor | 1994 | 1 | |||
| Ulla Ankerstjerne | Actor | 1997 | 1 | |||
| Betty Arvaniti | Actor | 1994 | 1 | |||
| Alessandra Arlotti | Actor | 1997 - 1998 | 3 | |||
| Alekos Anastasiou | Lighting Designer | 1994 - 2023 | 8 | |||
| Imants Adermanis | Actor | 1994 | 1 | |||
| Hilde Brun Amundsen | Actor | 1997 | 1 | |||
| Nayelli Aguirre | Actor | 1997 | 1 | |||
| Isabell Alder | Actor | 1994 | 1 | |||
| Konstantinos Avarikiotis | Actor | 1994 | 1 | |||
| Tõnu Aav | Actor | 1962 - 2007 | 9 | |||
| Jaak Arro | Designer | 1997 | 1 | |||
| Katrin Aebischer | Actor, Dancer | 1997 - 2005 | 6 | |||
| Bon Atomi | Actor | 1994 | 1 | |||
| Richard Aigner | Actor | 1995 - 2002 | 2 | |||
| Eliot C. Arnold | Actor | 1997 | 1 | |||
| Michalis Angelidakis | Actor | 1994 | 1 | |||
| Veronika Argentzi | Actor | 1994 | 1 | |||
| Marcello Amici | Actor, Adaptation, Designer, Director | 1995 | 4 | |||
| Paola Amici | Translator | 1995 | 1 | |||
| Robert Ashby | Actor | 1978 - 1980 | 6 | |||
| Karim Ameur | Dramaturg | 1995 | 1 | |||
| Jörg Adae | Actor | 1996 | 1 | |||
| Pia Alnerius | Actor, Costume Designer | 1995 | 4 | |||
| Jane Arnfield | Actor | 1995 | 1 | |||
| Brian Aldous | Lighting Designer | 1993 - 1996 | 2 | |||
| Richard Alger | Actor | 1996 | 1 | |||
| Doug Armentrout | Actor | 1996 | 1 | |||