| Karnecki, Zbigniew | Zbigniew Karnecki | Musical Director | 1974 | 1 | |
| Kabelač, Miroslav | Miroslav Kabelač | Musical Director | 1979 | 2 | |
| Kloke, Eberhard | Eberhard Kloke | Musical Director | 1975 | 1 | |
| Kovatzi-Skaltsa, Rena | Rena Kovatzi-Skaltsa | Musical Director | 1972 | 1 | |
| Kostřiba, Josef | Josef Kostřiba | Musical Director | 1988 | 1 | |
| Karger, Reinhard | Reinhard Karger | Musical Director | 1994 | 1 | |
| Kyriakaki-Loukissa, Olympia | Olympia Kyriakaki-Loukissa | Musical Director | 1978 - 2002 | 2 | |
| Krieg, Matthias | Matthias Krieg | Musical Director | 2016 | 1 | |
| Klinkenberg, Regina | Regina Klinkenberg | Musical Director | 2016 | 1 | |
| Kühlein, Fabian | Fabian Kühlein | Musical Director | 2011 | 1 | |
| Korth, Michael | Michael Korth | Musical Director | 2015 | 1 | |
| Kurn, Jeremy J. | Jeremy J. Kurn | Musical Director | 1999 | 1 | |
| Koutsoukos, Sakis | Sakis Koutsoukos | Musical Director | 1999 | 2 | |
| Kovacs, Dalma | Dalma Kovacs | Musical Director | 2016 | 1 | |
| Kirshenbaum, David | David Kirshenbaum | Musical Director | 1994 | 1 | |
| Kragset, Tove | Tove Kragset | Musical Director | 2019 | 1 | |
| Kalanov, Aleksansdar | Aleksansdar Kalanov | Musical Director | 2010 | 1 | |
| Köhler, Johannes | Johannes Köhler | Musical Director | 2021 | 1 | |
| Karadeloglou, Prodromos | Prodromos Karadeloglou | Musical Director | 2023 | 1 | |
| Kochetkov, Alexey | Alexey Kochetkov | Musical Director | 2021 | 1 | |
| Konieczny, Andrzej | Andrzej Konieczny | Musical Director | 2022 | 1 | |
| Kraska, Brigitte | Brigitte Kraska | Mask Maker | 1990 - 1992 | 2 | |
| Kraubs, Karl | Karl Kraubs | Mask Maker | 1969 | 1 | |
| Kampestuen, Akiko | Akiko Kampestuen | Mask Maker | 1990 | 1 | |
| Kindahl, John | John Kindahl | Mask Maker | 1998 | 1 | |
| Karlsson, Robin | Robin Karlsson | Mask Maker | 2008 | 10 | |
| Kellermann, Werner | Werner Kellermann | Mask Maker | 1975 - 1984 | 3 | |
| Kindahl, Janne | Janne Kindahl | Mask Maker | 2002 - 2003 | 6 | |
| Krogstad, Jenny | Jenny Krogstad | Mask Maker | 1971 | 1 | |
| Kroese, Gerhard | Gerhard Kroese | Mask Maker | 1992 - 1995 | 3 | |
| Kurel, Rudolf | Rudolf Kurel | Mask Maker | 1972 | 1 | |
| Kres, Hans | Hans Kres | Mask Maker | 1959 - 1963 | 6 | |
| Kirchhoff, Otti | Otti Kirchhoff | Mask Maker | 1966 - 1977 | 2 | |
| König, Nina | Nina König | Mask Maker | 2014 - 2015 | 2 | |
| Kilpiö, Monica | Monica Kilpiö | Mask Maker | 1993 | 1 | |
| Kosse, Grit | Grit Kosse | Mask Maker | 1994 | 1 | |
| Kanto, Maija | Maija Kanto | Mask Maker | 1994 | 1 | |
| Keller, Helve | Helve Keller | Mask Maker | 1997 | 1 | |
| Krussenberg, Corinna | Corinna Krussenberg | Mask Maker | 1995 | 1 | |
| Kulle, Josefin | Josefin Kulle | Mask Maker | 2013 | 1 | |
| Kristensen, Thea, Holmberg | Thea Holmberg Kristensen | Mask Maker | 2015 - 2017 | 4 | |
| Kreyer, Herbert | Herbert Kreyer | Mask Maker | 1962 | 1 | |
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