| Todorov, Kiril | Kiril Todorov | Musical Director | 1974 | 1 | |
| Tsatsouli, Kleio | Kleio Tsatsouli | Musical Director | 1972 - 1990 | 3 | |
| Trieder, Jan | Jan Trieder | Musical Director | 1988 | 1 | |
| Towns, Colin | Colin Towns | Musical Director | 2014 | 2 | |
| Taravella, August | August Taravella | Musical Director | 1918 | 1 | |
| Teussink, Maartje | Maartje Teussink | Musical Director | 2017 | 1 | |
| Tot, Ilona | Ilona Tot | Musical Director | 1992 | 1 | |
| Todua, David | David Todua | Musical Director | 2013 | 1 | |
| Tali, Anu | Anu Tali | Musical Director | 2025 | 1 | |
| Todd, Rachel | Rachel Todd | Mask Maker | 1928 | 2 | |
| Tiller, Asbjørn | Asbjørn Tiller | Mask Maker | 1994 | 1 | |
| Tank, Heinz W. | Heinz W. Tank | Mask Maker | 1975 | 1 | |
| Theofanous-Vlachou, Myrto | Myrto Theofanous-Vlachou | Mask Maker | 2012 | 1 | |
| Tellström-Bergh, Mona | Mona Tellström-Bergh | Mask Maker | 1984 | 1 | |
| Thornton, Sylvia | Sylvia Thornton | Mask Maker | 1988 | 1 | |
| Takanen, Riina | Riina Takanen | Mask Maker | 2002 | 1 | |
| Tarak, - | - Tarak | Mask Maker | 2006 | 3 | |
| Trory, Meran | Meran Trory | Mask Maker | 2006 | 1 | |
| Townsend, Daniel | Daniel Townsend | Mask Maker | 2006 | 1 | |
| Thiele, Erich | Erich Thiele | Mask Maker | 1951 | 1 | |
| Tuerk, Laurence | Laurence Tuerk | Lighting Designer, Sound Designer | 1977 - 1984 | 3 | |
| Tanner, Giles | Giles Tanner | Lighting Designer, Sound Designer | 2003 | 2 | |
| Theo, John | John Theo | Lighting Designer, Sound Designer | 2018 | 2 | |
| Town, Johanna | Johanna Town | Lighting Designer | 2000 - 2003 | 2 | |
| To, German | German To | Lighting Designer | 2001 | 1 | |
| Takashima, Katsunosuke | Katsunosuke Takashima | Lighting Designer | 1928 | 1 | |
| Tan, Victor En Yu | Victor En Yu Tan | Lighting Designer | 1988 | 1 | |
| Tweebeeke, Reinier | Reinier Tweebeeke | Lighting Designer | 1992 - 1996 | 21 | |
| Tønder, Ingrid | Ingrid Tønder | Lighting Designer | 2003 | 37 | |
| Traub, Reinhard | Reinhard Traub | Lighting Designer | 2003 - 2008 | 5 | |
| Tynes, Dag | Dag Tynes | Lighting Designer | 2011 | 1 | |
| Thomassen, Per | Per Thomassen | Lighting Designer | 1971 | 44 | |
| Thayer, David | David L. Thayer | Lighting Designer | 1965 - 1979 | 2 | |
| Tammes, Andre | Andre Tammes | Lighting Designer | 1972 | 6 | |
| Torres, Carlos | Carlos Torres | Lighting Designer | 1976 - 1994 | 3 | |
| Thompson, Howard | Howard Thompson | Lighting Designer | 1961 - 1981 | 4 | |
| Tartaix, Raoul | Raoul Tartaix | Lighting Designer | 1976 | 1 | |
| Tohyama, Shizuo | Shizuo Tohyama | Lighting Designer | 1923 | 1 | |
| Tipton, Jennifer | Jennifer Tipton | Lighting Designer | 1983 - 2009 | 7 | |
| Torres, Santos | Santos Torres | Lighting Designer | 1976 | 1 | |
| Trautvetter, Dieter | Dieter Trautvetter | Lighting Designer | 1986 | 1 | |
| Tondellier, Liliane | Liliane Tondellier | Lighting Designer | 1993 - 2004 | 15 | |
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