Mathias Theisen was born in Denmark and graduated in 2019 with a Bachelor's degree in Dance from the Royal Conservatoire Antwerp (Belgium). As a student, he worked with renowned choreographers and dance companies, including Anton Lachky, Agostina D'Alessandro, Claire Croizé, Renan Martins, Ultima Vez and Rosas Dance Company. In September 2020, he choreographed the solo »Ego Trip«, which was presented at Theatre Edison (Frederiksberg) as part of the new Dansehallerne programme »New Sh*t«. At the end of the 2020/21 season, Theisen became a member of the DTH ensemble.