| Molinari, Nadia | Nadia Molinari | Director | 2012 | 1 | |
| Munson, John | John Munson | Director | 2016 | 1 | |
| Moorby, Frank | Frank Moorby | Director | 2012 | 1 | |
| Mantaropoulos, Giorgos | Giorgos Mantaropoulos | Director | 2006 | 1 | |
| Münch, Josef | Josef Münch | Director | 1920 | 1 | |
| Marting, Kristin | Kristin Marting | Director | 2009 - 2010 | 2 | 1 |
| Maurach, Johannes | Johannes Maurach | Director | 1922 - 1943 | 2 | |
| Miltner, Rudolf | Rudolf Miltner | Director | 1923 | 1 | |
| Maisch, Herbert | Herbert Maisch | Director | 1928 | 1 | |
| Möller, A. | A. Möller | Director | 1934 | 1 | |
| Malacrida, Bernardo | Bernardo Malacrida | Director | 1965 | 1 | |
| Mayo, Devon, de | Devon de Mayo | Director | 2008 | 1 | |
| Menendian, Michael | Michael Menendian | Director | 2009 | 1 | |
| Miller, Les | Les Miller | Director | 2009 | 1 | |
| Murugesan, K. | K. Murugesan | Director | 2015 | 1 | |
| Miyagi, Satoshi | Satoshi Miyagi | Director | 2010 - 2023 | 3 | |
| Melo, Jorge, Silva | Jorge Silva Melo | Director | 2010 | 2 | |
| Miyata, Keiko | Keiko Miyata | Director | 2010 | 1 | 1 |
| Mikat, Mareike | Mareike Mikat | Director | 2014 - 2016 | 17 | |
| Morden, David | David Morden | Director | 2010 | 1 | |
| Melson, Søren | Søren Melson | Director | 1964 | 1 | |
| Malaev-Babel, Andrei | Andrei Malaev-Babel | Director | 2011 - 2019 | 2 | |
| Macdonald, James | James Macdonald | Director | 2010 - 2011 | 2 | 1 |
| McNamara, Robert | Robert McNamara | Director | 2012 | 1 | 1 |
| Morasch, Juri | Juri Morasch | Director | 2012 | 1 | |
| Mokrusch, Ulrich | Ulrich Mokrusch | Director | 2014 - 2018 | 2 | |
| Mehler, Christoph | Christoph Mehler | Director | 2013 - 2017 | 3 | 1 |
| Mattila, Aino | Aino Mattila | Director | 1964 | 1 | |
| Münzing, Nilufar, K. | Nilufar K. Münzing | Director | 2015 | 1 | |
| McKinney, William, L. | William L. McKinney | Director | 1964 | 1 | 1 |
| Merkle, Ulrike | Ulrike Merkle | Director | 2011 | 1 | |
| Morgan, William, R. | William R. Morgan | Director | 1964 | 1 | 1 |
| Mugur, Vlad | Vlad Mugur | Director | 1964 - 1965 | 2 | |
| May, Val | Val May | Director | 1958 - 1971 | 4 | |
| McLaughlin, Caitriona | Caitriona McLaughlin | Director | 2011 | 1 | |
| Macdonald, Will | Will Macdonald | Director | 1961 | 1 | |
| May-Wolsdorff, Ricky | Ricky May-Wolsdorff | Director | 2012 - 2013 | 11 | |
| Mhlanga, Cont | Cont Mhlanga | Director | 2011 | 1 | |
| Mianowska, Aleksandra | Aleksandra Mianowska | Director | 1960 | 1 | |
| McBryde, Ryan | Ryan McBryde | Director | 2011 | 1 | |
| Mugur, Val | Val Mugur | Director | 1944 | 1 | |
| Mărăscu, Tudor | Tudor Mărăscu | Director | 1988 | 1 | |
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