He has worked on many research projects in the fields of interdisciplinary cooperation between nurses and physicians, nursing professionalization processes in Germany as well as psychiatry in that country. As a nurse, he has worked in different areas of the profession. He taught at a nursing school in Germany before he came to Canada. His doctoral research project explores the participation of nurses in the killing of more than 200,000 sick persons during the Nazi regime. He received financial support fromRobert Bosch Stiftung, a foundation in Germany, and the AMS Nursing History Research Unit at the University of Ottawa.