| Mâzgăreanu, Alexandru | Alexandru Mâzgăreanu | Director | 2005 | 1 | |
| Munoz-Orellana, Horacio | Horacio Munoz-Orellana | Director | 1976 | 1 | |
| Mashiter, Chloe | Chloe Mashiter | Director | 2015 | 1 | |
| Merzbacher, Klaus | Klaus Merzbacher | Director | 1977 | 1 | |
| Machin, Gareth | Gareth Machin | Director | 2016 | 1 | |
| Mueller, Rick | Rick Mueller | Director | 1978 | 1 | |
| McRae, Katherine | Katherine McRae | Director | 2017 | 1 | |
| Matalon, Vivian | Vivian Matalon | Director | 1978 | 1 | 1 |
| Morgan, Margaret | Margaret Morgan | Director | 1981 | 1 | |
| McGill, Roger | Roger McGill | Director | 1983 | 1 | |
| Mesarić, Želimir | Želimir Mesarić | Director | 1984 - 1996 | 2 | |
| Moeremans, Sarah | Sarah Moeremans | Director | 2013 - 2023 | 32 | 1 |
| Marlowe, Ina | Ina Marlowe | Director | 2017 | 1 | |
| Manchester, Alaina | Alaina Manchester | Director | 2017 | 1 | |
| Mohr, Joerg | Joerg Mohr | Director | 2017 | 1 | |
| McAuliffe, Jody | Jody McAuliffe | Director | 2016 | 1 | |
| Meils, Cathy | Cathy Meils | Director | 2018 | 1 | |
| Migliarisi, Anna | Anna Migliarisi | Director | 2018 | 1 | |
| McKeown, Archie | Archie McKeown | Director | 2018 | 1 | |
| Meall, Jocelyn | Jocelyn Meall | Director | 2018 | 1 | |
| Marshall, JanLee | JanLee Marshall | Director | 2018 | 1 | |
| Miura, Motoi | Motoi Miura | Director | 2016 | 1 | |
| Munby, Jonathan | Jonathan Munby | Director | 2018 | 2 | |
| Madden, Jeff | Jeff Madden | Director | 2019 | 1 | |
| McCoy-Reese, Rebecca | Rebecca McCoy-Reese | Director | 2019 | 1 | |
| Menon, Vasudev | Vasudev Menon | Director | 2019 | 1 | |
| McCrae, Katherine | Katherine McCrae | Director | 2019 | 3 | |
| Muradbegović, Ahmed | Ahmed Muradbegović | Director | 1944 | 1 | |
| Mohammad, Sara | Sara Mohammad | Director | 1997 | 1 | |
| Mustafa, Ranj | Ranj Mustafa | Director | 2019 | 1 | |
| Masso, José Luis | José Luis Masso | Director | 2015 | 1 | |
| Manrique, Julio | Julio Manrique | Director | 2017 - 2020 | 2 | |
| McDowell, W. Stuart | W. Stuart McDowell | Director | 2020 | 1 | |
| Manskij, David | David Manskij (Давид Манский) | Director | 1939 | 1 | |
| Michajlov, A. | A. Michajlov | Director | 1948 | 1 | |
| Massal'skij, Pavel | Pavel Massal'skij | Director | 1956 | 1 | |
| Meerskon, L. | L. Meerskon | Director | 1966 | 1 | |
| Mirkin, Ja. | Ja. Mirkin | Director | 1955 | 1 | |
| Marson, K. | K. Marson | Director | 1968 | 1 | |
| Merlo, Manuel | Manuel Merlo | Director | 2010 | 1 | |
| Mata Ramos, Andrés | Andrés Mata Ramos | Director | 2008 | 1 | |
| Magar, Taibi | Taibi Magar | Director | 2020 | 1 | |
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