| Mazzagatti, Pacien | Pacien Mazzagatti | Conductor | 2005 | 1 | |
| Mikkelsen, Terje | Terje Mikkelsen | Conductor | 2014 - 2015 | 4 | |
| Myers, Timothy | Timothy Myers | Conductor | 2006 | 1 | |
| Martin, Alexander | Alexander Martin | Conductor | 2008 | 1 | |
| Mees, Siegbert | Friedrich Siegbert Mees | Conductor | 1926 - 1938 | 2 | |
| Michalski, Carl | Carl Michalski | Conductor | 1938 | 1 | |
| Meik, Siegfried | Siegfried Meik | Conductor | 1939 | 1 | |
| Masson, Louis | Louis Masson | Conductor | 1933 | 1 | |
| Mooser, Anton | Anton Mooser | Conductor | 1951 | 1 | |
| Menges, Herbert | Herbert Menges | Conductor | 1935 - 1944 | 3 | |
| Mitropoulos, Dimitris | Dimitris Mitropoulos | Conductor | 1935 | 1 | |
| Mechlenburg, Fritz | Fritz Mechlenburg | Conductor | 1940 | 1 | 1 |
| Maresch, Jacques | Jacques Maresch | Conductor | 2017 | 2 | |
| Moro, Moreno | Moreno Moro | Conductor | 1978 - 1980 | 2 | |
| Marchand, Miguel, Patron | Miguel Patron Marchand | Conductor | 1986 | 1 | |
| Murray, J. Ainslie | J. Ainslie Murray | Conductor | 1908 | 1 | |
| Moonie, William, B. | William B. Moonie | Conductor | 1924 | 1 | |
| Marie, Gabriel | Gabriel Marie | Conductor | 1896 | 1 | 1 |
| Muck, Carl | Karl Muck | Conductor | 1905 | 1 | |
| Maneja, Antoni Ribera | Antoni Ribera Maneja | Conductor | 1910 | 1 | |
| Manns, Ferdinand | Ferdinand Manns | Conductor | 1911 | 1 | |
| Malaka, Oscar | Oscar Malaka | Conductor | 1917 | 1 | |
| McLaren, C. | C. McLaren | Conductor | 1917 | 1 | |
| Mayer, Karl | Karl Mayer | Conductor | 1919 | 1 | |
| Merten, Bernh. | Bernh. Merten | Conductor | 1919 | 1 | |
| Meißner, Hoffkapellmester | Hoffkapellmester Meißner | Conductor | 1919 | 1 | |
| Mennerich, Adolf | Adolf Mennerich | Conductor | 1926 | 1 | |
| Masur, Ken-David | Ken-David Masur | Conductor | 2017 - 2022 | 2 | |
| Molenat, Yann | Yann Molenat | Conductor | 2023 | 1 | |
| Meena, Vimal | Vimal Meena (विमल मीणा) | Conductor | 2024 | 1 | |
| Maghini, Ruggero | Ruggero Maghini | Conductor | 1971 | 1 | |
| Mills, Harold | Harold Mills | Conductor, Musical Director | 1914 - 1921 | 2 | |
| MacMillan, Ernest | Ernest MacMillan | Conductor, Musical Director | 1930 | 2 | |
| Magnusson, Erika | Erika Magnusson | Costume Designer | 2007 | 1 | |
| Mansos, Holly | Holly Mansos | Costume Designer | 2000 | 1 | |
| Martin, Janis | Janis Martin | Costume Designer | 2000 - 2011 | 20 | 3 |
| Martin, Mooch | Mooch Martin | Costume Designer | 1990 | 1 | |
| Matela, Kimberly | Kimberly Matela | Costume Designer | 2006 | 2 | |
| Mavromataki, Kelly | Kelly Mavromataki | Costume Designer | 2006 | 3 | |
| Meinhold, Reinhard | Reinhard Meinhold | Costume Designer | 1972 | 1 | |
| Merino, Juana | Juana Merino | Costume Designer | 1956 | 1 | |
| Messmer, Valérie | Valérie Messmer | Costume Designer | 2006 | 1 | |
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