| Merlo, Manuel | Manuel Merlo | Director | 2010 | 1 | |
| Mata Ramos, Andrés | Andrés Mata Ramos | Director | 2008 | 1 | |
| Magar, Taibi | Taibi Magar | Director | 2020 | 1 | |
| Maržanov, M. | M. Maržanov | Director | 1931 | 1 | |
| Melgosa, Fernando | Fernando Melgosa | Director | 1991 | 1 | |
| Manganari, Maria | Maria Manganari | Director | 2020 | 1 | |
| Mostafaei, Niloufar | Niloufar Mostafaei | Director | 2019 | 1 | |
| Moosavi, Rahim | Rahim Moosavi | Director | 2018 – 2020 | 2 | |
| Moschos, Giannis | Giannis Moschos | Director | 2020 | 1 | |
| Marzban, Hadi | Hadi Marzban | Director | 2006 | 1 | |
| Milanizadeh, Soroosh | Soroosh Milanizadeh | Director | 2018 | 1 | |
| Mobasheri, Maaneli | Maaneli Mobasheri | Director | 2019 | 1 | |
| Mohajeri, Mahsa | Mahsa Mohajeri | Director | 2019 | 1 | |
| Molander, Christer | Christer Molander | Director | 2011 | 1 | |
| Marston, Theodore | Theodore Marston | Director | 1911 | 1 | |
| Mitchell, Leon | Leon Mitchell | Director | 2020 | 1 | |
| Marcussen, Yngve, | Yngve Marcussen | Director, Dramaturg | 2012 – 2015 | 6 | |
| Mädler , Kathrin | Kathrin Mädler | Director, Dramaturg | 2011 – 2017 | 4 | |
| McLaren, Robert | Robert McLaren | Director, Lighting Designer | 2006 | 6 | |
| Mason, Marshall W. | Marshall W. Mason | Director, Lighting Designer | 1964 | 2 | |
| Mercado, Antonio | Antonio Mercado | Director, Lighting Designer | 2006 – 2007 | 15 | |
| Manea , Aureliu | Aureliu Manea | Director, Lighting Designer | 1968 | 2 | |
| Mosarov, Vladimir | Vladimir Mosarov | Director, Sound Designer | 2001 | 2 | |
| McCready, Kelly | Kelly McCready | Director, Sound Designer | 2016 | 2 | |
| Malmgren, Oskar, | Oskar Malmgren | Director, Translator | 1878 – 1885 | 10 | |
| Muinzer, Louis | Louis Muinzer | Director, Translator | 1983 – 1990 | 6 | |
| Mirski, Krastjo | Krastjo Mirski | Director, Translator | 1956 – 1962 | 2 | |
| Mouzenidis, Takis | Takis Mouzenidis | Director, Translator | 1945 – 1965 | 5 | |
| Martinelli, Jean-Louis | Jean-Louis Martinelli | Director, Translator | 2010 – 2012 | 6 | |
| Mellor, Aubrey | Aubrey Mellor | Director, Translator | 1984 – 1989 | 3 | |
| Milčin, Ilija | Ilija Milčin | Director, Translator | 1957 | 2 | |
| Mesarić, Kulman | Kulman Mesarić | Director, Translator | 1948 | 2 | |
| Maier-Gehring, Christoph | Christoph Maier-Gehring | Dramaturg | 2001 | 2 | |
| Maslon, Laurence | Laurence Maslon | Dramaturg | 1985 – 1995 | 3 | |
| Mitchell, Chris | Chris Mitchell | Dramaturg | 2003 | 1 | |
| Möckel, Manfred | Manfred Möckel | Dramaturg | 1967 | 1 | |
| Muszynski, Gerd, | Gerd Muszynski | Dramaturg | 2004 | 1 | |
| Meyer MacLeod, Arielle | Arielle Meyer MacLeod | Dramaturg | 2004 | 1 | |
| Moos, Karl Heinz | Karl Heinz Moos | Dramaturg | 1975 | 1 | |
| Matĕjíček, Jiří | Jiří Matĕjíček | Dramaturg | 1973 | 1 | |
| Martinc, Dijana | Dijana Martinc | Dramaturg | 1981 | 1 | |
| Mayer, Christian | Christian Mayer | Dramaturg | 2007 – 2012 | 2 | |
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