| Mathis, Marco | Marco Mathis | Sound Designer | 2011 | 1 | |
| McMasters, Ryan | Ryan McMasters | Sound Designer | 2013 | 1 | |
| Mardikes, Tom | Tom Mardikes | Sound Designer | 1999 | 1 | |
| Mordal, Eirik | Eirik Mordal | Sound Designer | 2017 | 1 | |
| Milburn, Rob | Rob Milburn | Sound Designer | 2017 | 1 | |
| Miles, Geoff | Geoff Miles | Sound Designer | 2017 | 17 | |
| Molnar, Teodor | Teodor Molnar | Sound Designer | 2013 - 2015 | 2 | |
| Matei, Doina | Doina Matei | Sound Designer | 2005 | 1 | |
| Machado, Otávio | Otávio Machado | Sound Designer | 1990 | 1 | |
| Malcolm, Jess | Jess Malcolm | Sound Designer | 2013 | 1 | |
| Magee, Sean | Sean Magee | Sound Designer | 1975 | 1 | |
| McDonald, Brian | Brian McDonald | Sound Designer | 2018 | 1 | |
| Mauder, Björn | Björn Mauder | Sound Designer | 2018 | 1 | |
| Maxwell, Brooke | Brooke Maxwell | Sound Designer | 2019 | 1 | |
| Mohamad, Halmat | Halmat Mohamad | Sound Designer | 2013 - 2014 | 3 | |
| Mirni, Andrej | Andrej Mirni | Sound Designer | 2019 | 1 | |
| Magaljas, Vadim | Vadim Magaljas | Sound Designer | 2019 | 1 | |
| Marcial, Eve | Eve Marcial | Sound Designer | 1976 | 1 | |
| Mullen, Dinah | Dinah Mullen | Sound Designer | 2021 | 1 | |
| Mateka, Christoph | Christoph Mateka | Sound Designer | 2022 | 1 | |
| Maldonado, José Antonio | José Antonio Maldonado | Sound Designer | 1978 | 1 | |
| Marabolí, Daniel | Daniel Marabolí | Sound Designer | 2022 | 1 | |
| Matrakoska, Natalija | Natalija Matrakoska (Наталија Матракоска) | Set Designer | 2022 | 1 | |
| Meier, Charles T. | Charles T. Meier | Set Designer | 2022 | 1 | |
| Moragas, Miquel | Miquel Moragas | Set Designer | 1903 - 1906 | 2 | |
| Mercier, Skip | Skip Mercier | Set Designer | 2018 | 1 | |
| McInnis, Morgan | Morgan McInnis | Set Designer | 2023 | 1 | |
| Macadoux, Justine | Justine Macadoux | Puppet Designer | 2016 | 1 | |
| Mauer, Lubo | Lubo Mauer | Producer, Translator | 1975 - 1976 | 4 | |
| Meriläinen, Marja | Marja Meriläinen | Producer | 2006 | 1 | |
| Monn-Iversen, Bitte | Bitte Monn-Iversen | Producer | 2005 | 1 | |
| McNutt, Patterson | Patterson McNutt | Producer | 1926 - 1927 | 7 | |
| Messina, Cedric | Cedric Messina | Producer | 1965 - 1974 | 7 | |
| Murúa, Guillermo | Guillermo Murúa | Producer | 1990 | 1 | |
| Minnen, Peter van | Peter van Minnen | Producer | 1992 | 1 | |
| Munthe, Tobias | Tobias Munthe | Producer | 2003 | 1 | |
| Mathisen, Rebecca | Rebecca Mathisen | Producer | 2015 - 2016 | 52 | |
| Murray, Jacob | Jacob Murray | Producer | 2001 | 1 | |
| Maloney, Margaret | Margaret Maloney | Producer | 2005 | 1 | |
| Marklund, Max | Max Marklund | Producer | 2015 | 1 | |
| Miccoci, Tony | Tony Miccoci | Producer | 2009 | 1 | |
| Massini, Fabrizio | Fabrizio Massini | Producer | 2014 - 2019 | 9 | |
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