| Marie, Élisabeth | Élisabeth Marie | Director | 1991 | 1 | |
| Marin, François | François Marin | Director | 2018 | 3 | |
| Meigné, Benoît | Benoît Meigné (Meigne, Benoît) | Director | 2015 | 2 | |
| Melrose, Rob | Rob Melrose | Director | 2021 | 1 | |
| Michalik, Mariusz | Mariusz Michalik | Director | 2009 | 1 | |
| Marischka, Georg | Georg Marischka | Director | 1977 | 1 | |
| Missiroli , Mario | Mario Missiroli | Director | 1972 | 1 | |
| Medford, Don | Don Medford | Director | 1954 - 1959 | 2 | |
| More O'Ferrall, George | George More O'Ferrall | Director | 1957 | 1 | |
| Marks, Sherman | Sherman Marks | Director | 1957 | 1 | |
| Metzner, Ernö | Ernö Metzner | Director | 1933 | 1 | |
| Modestowicz, Waldemar | Waldemar Modestowicz | Director | 2006 | 1 | |
| Mandić Rigonat, Tatjana | Tatjana Mandić Rigonat | Director | 2021 | 1 | |
| Murphy, Joe | Joe Murphy | Director | 2022 | 1 | |
| Murray, Jake | Jake Murray | Director | 2022 | 10 | |
| Mario, Emilio | Emilio Mario | Director | 1896 | 1 | |
| Miralles, Carlos | Carlos Miralles | Director | 1938 | 1 | |
| Miró, Pau | Pau Miró | Director | 2015 - 2017 | 3 | |
| Maehler, Tobias | Tobias Maehler | Director | 2023 | 7 | |
| Mariam, Helen T | Helen T Mariam | Director | 2023 | 1 | |
| McAfee, Hailey | Hailey McAfee | Director | 2023 | 1 | |
| Mukhopadhyay, Suman | Suman Mukhopadhyay | Director | 2019 | 1 | |
| Moppel, Kertu | Kertu Moppel | Director | 2019 | 1 | |
| Masini, Jim | Jim Masini | Director | 2024 | 1 | |
| Minino, Antonio | Antonio Minino | Director | 2017 | 1 | |
| Merz-Raykov, Andreas | Andreas Merz-Raykov | Director | 2022 | 1 | |
| Matsyna, Olga | Olga Matsyna | Director | 2011 | 1 | |
| Merulla, Gina | Gina Merulla | Director | 2015 | 1 | |
| Masserano Taricco, Pietro | Pietro Masserano Taricco | Director | 1956 - 1962 | 2 | |
| Migliaccio, Luigi | Luigi Migliaccio | Director | 2017 | 1 | |
| Margio, Ugo | Ugo Margio | Director | 1986 | 1 | |
| Mabellini, Sandro | Sandro Mabellini | Director | 2015 | 1 | |
| Marino, Elena R. | Elena R. Marino | Director | 2017 | 2 | |
| Masuth, Christian | Christian Masuth | Designer, Translator | 1990 - 2001 | 4 | |
| Melissa, Thalia | Thalia Melissa | Designer, Set Designer | 2022 - 2023 | 5 | |
| Meeker, Dan | Dan Meeker | Designer, Lighting Designer | 2003 | 2 | |
| Mumford, Peter | Peter Mumford | Designer, Lighting Designer | 1996 - 2016 | 18 | 1 |
| Mayer, Kit | Kit Mayer | Designer, Lighting Designer | 2006 - 2014 | 10 | 1 |
| Murnin, Michael J. | Michael J. Murnin | Designer, Lighting Designer | 1992 | 2 | |
| Martins, Henrique | Henrique Martins | Designer, Lighting Designer | 1996 - 1997 | 16 | |
| Moise, Candice | Candice Moise | Designer, Lighting Designer | 2004 | 2 | |
| Mutiso, Barnabas | Barnabas Mutiso | Designer, Lighting Designer | 2005 | 2 | |
|
|
