| Name | Functions  | Event Dates | Events | Resources | ||
|---|---|---|---|---|---|---|
| Sun Aina | Mask Maker | 2014 - 2020 | 7 | |||
| Sylke Aehlig | Mask Maker | 2002 | 1 | |||
| Torbjörn Alström | Mask Maker | 2002 - 2006 | 6 | |||
| Mikaela Artén | Mask Maker | 2001 | 1 | |||
| Agneta Andersson Forssell | Mask Maker | 2003 | 1 | |||
| Tricia Ayres | Mask Maker | 2006 | 1 | |||
| Anna Jensen Arktoft | Mask Maker | 2014 - 2016 | 3 | |||
| João Amaral | Mask Maker | 1977 | 1 | |||
| Rebecca Abbott | Mask Maker | 2017 | 1 | |||
| Ourania Argyropoulou | Musical Director | 2015 | 1 | |||
| Ido Arad | Musical Director | 2014 | 1 | |||
| Hanns Avril | Musical Director | 1916 | 1 | |||
| Timuş Alexandrescu | Musical Director | 1980 - 1987 | 3 | |||
| Haleh Abghari | Musical Director | 2018 | 1 | |||
| Josef Achtelik | Musical Director | 1916 | 1 | |||
| Ming A | Musical Director | 2019 | 1 | |||
| Mihail Aleksandrov | Musical Director | 2011 | 1 | |||
| Thomas Andersen | Musician | 2013 | 1 | |||
| Knut Aalefjær | Musician | 1993 - 2013 | 3 | |||
| Tym Andersen | Musician | 1990 | 1 | |||
| Stefan Abelsson | Musician | 1993 | 1 | |||
| Gunnar Aas | Musician | 1989 | 1 | |||
| Eva Alkula | Musician | 2001 | 1 | |||
| Judith Arens | Musician | 2001 - 2002 | 2 | |||
| Sohrab Ali Shohel | Musician | 2006 | 2 | |||
| Tanvir Azad Bikash | Musician | 2006 | 2 | |||
| Chris Allen | Musician | 2009 | 1 | |||
| Costanza Alegiani | Musician | 2010 | 1 | |||
| Salim Asar | Musician | 2013 | 10 | |||
| Thaleia Athaniti | Musician | 1998 | 1 | |||
| Cătălina Antal | Musician | 2015 - 2016 | 6 | |||
| Md. Monir Ahmed | Musician | 2000 - 2001 | 4 | |||
| Tore Aune | Musician | 1992 | 1 | |||
| Torgeir Andersen | Musician | 1992 | 1 | |||
| Carlos Alberici | Musician | 1984 | 24 | |||
| Isak Anderssen | Musician | 1992 | 1 | |||
| Raul Alvarellos | Musician | 1995 | 1 | |||
| Fernando Arminio | Musician | 2017 - 2020 | 2 | |||
| Jean-Pierre Arnaud | Musician | 2013 | 1 | |||
| Clara Abou | Musician | 2013 | 1 | |||
| Cristopher Allan | Musician | 2015 | 1 | |||
| Tomás Alves | Musician | 2022 | 2 | |||