Margot Kalse is a classical alt-mezzo singer, specializing in early music. Kalse is founder and leader of the Trigon Ensemble of medieval vocal music.
Kalse is also an experienced singing teacher and has been a choir conductor since 2010. She has her own singing school and gives vocal training to choirs. Kalse has conducted baroque opera's and choir projects, and was guest director of the Leiden Ekklesia Schola Cantorum. She is the creator and maker of the Top 40 van de Gouden Eeuw (Dutch Golden Age Top 40).