The XIIth National Symposium of
Surgical training and fellowship in visceral surgery at the Heidelberg University Hospital 1984-1994
Attending General Surgeon Charite Berlin 1994-2000
Chairman of the Department of General Surgery Villingen-Schwenningen 2000-2018
Chairman of the Department of Bariatric and Metabolic Surgery, Sana Hospital Offenbach 2018-2020
Chairman of the Department of Surgery, Spital Einsiedeln, Switzerland since 10/2020