Hans Leenders is artistic director of the professional chamber choir Studium Chorale and vocal ensemble Cantatrix, artistic advisor of the Dutch Gregorian Chant festival and the festival L'Europe & l'Orgue.
He is a principal teacher for organ at the Maastricht Conservatory, conductor of the conservatory choir and Basilica choir Maastricht, and teaches Gregorian chant at the Folkwang-University of Arts in Essen (Germany) during summer-courses.
Hans Leenders is the principal organist of the Basilica of our Lady in Maastricht (Séverin 1652, Müseler 1765) and organist-titular in the Kopermolen in Vaals (Hilgers 1765).
Guest conductor with Radio-choir Slovenia, Groot Omroepkoor, Cappella Amsterdam, Europa Cantat and several conservatories in Europe.
Orchestral productions with Philharmonie Zuidnederland, Symfonieorkest Vlaanderen, Concerto d'Amsterdam, Florilegium Musicum and Ensemble '88 (specialised in contemporary music).
As a composer he is known especially for his vocal music, editions by Ascolta, Harmonia and De Haske.