Patrick van Dun has a private practice as an osteopath in Mechelen (Belgium) and Habichtswald (Germany).
He is a Board of Trustees member of the Centre for Osteopathic MEdicine Collaboration (COME), Pescara (Italy), an interdisciplinary foundation for osteopathy excellence. He is the chair and co-founder of the Commission for Osteopathic Research, Practice and Promotion vzw (CORPP), a non-profit organization that promotes osteopathic scientific research in Belgium

He got his M.Sc. degree in Rehabilitation and Physical Therapy at the Catholic University Leuven and completed his osteopathy studies at COC, organised at the Free University of Brussels.

Previously, he has lectured at several European osteopathic education institutes. He has been the Scientific Director of the German College for Osteopathic Medicine (GCOM), Wiesbaden (Germany) from 2000 till 2006 and Head of Research of Osteopathy, Department Clinical Medicine and Biotechnology, Danube University Krems (Austria) from 2010 till 2012. Patrick has been a research collaborator at the Free University of Brussels, Department of Osteopathic Sciences, Research Unit in Osteopathy, Brussels (Belgium) from 2012 till 2016.