Theresa Klose was born in Bonn in 1995. After graduating in music education and German language and literature studies, Klose began studying singing in 2016 in the class of Prof. Kai Wessel at the Cologne Musikhochschule and graduated with top marks in 2020.

She has since continued her training with the soprano Juanita Lascarro in Frankfurt. In October 2022 she also began postgraduate studies with Prof. Thilo Dahlmann, also in Frankfurt.

Concert tours have taken her to England, France, Norway and Italy, among other places. She has also sung on concert and opera stages in Germany, for example at the »Festival Alte Musik« in Knechtsteden, the Kölner Philharmonie or in Cologne Cathedral. In April 2019, she was heard with the Bochum Symphony Orchestra under the baton of Steven Sloane as the Flower Girl in Wagner's »Parsifal«. She has worked with the Cologne Baroque Orchestra and members of the Gürzenich Orchestra, among others. In addition, she has been working as a voice coach for the cathedral choirs at Cologne Cathedral since 2017.