Rozemarie Heggen studied double bass at the conservatories of Maastricht, Amsterdam and The Hague. During her studies she has been the solo bassist of the National Youth Orchestra of the Netherlands and the Jeunnesses Musicales Worldorchestra.
She has been working as a free-lance musician in all the main orchestras, chamber orchestras and contemporary music groups in the Netherlands, such as The Royal Concertgebouw Orchestra, Nieuw Sinfonietta Amsterdam, Asko/Schonberg Ensemble.
Nowadays she is mainly working as a performer of contemporary music and as an improvising musician. She has been a member of experimental groups like the Maarten Altena Ensemble, The Electric Aardvark and Het Nieuw Ensemble.