Augusta-Krankenanstalten Bochum, General Surgery Residency (1982-1988)
Martin-Luther-Krankenhaus Bochum-Wattenscheid, General Surgery Residency (1988-1989)
Heart and Diabetes Center NRW, University of Bochum, Cardiothoracic Surgery Residency (1990-1992)
Bergmannsheil Hospital Bochum, Deputy Director (1992-1994)
Heart and Diabetes Center NRW Bad Oeynhausen, University of Bochum, Staff (1994-6/2005)
Heart and Diabetes Center NRW Bad Oeynhausen, University of Bochum, Deputy Director (7/2005-2010)
Onassis Cardiac Surgery Center, Director Cardiothoracic Surgery-Transplantation Services (2010-)