Head of Dept. of Bariatric, Metabolic and Plastic Surgery (since 2017) at Cologne, Germany Diploma in General, Trauma, Visceral, Colorectal Surgery, Proctology, Nutritional, Emergency, and Sports Medicine. Fellow European Board of Surgery. Medical studies in Germany and RSA until 1988. Since 1998 Consultant Surgeon in Germany and France. Repeated humanitarian missions in Africa and Asia (mainly with Doctors without Borders). Since 2011 scientific focus on OAGB and NAFLD. Lecturer for Bariatric Surgery at University of Aachen, Germany (Senior Lecturer/Ass.Prof. since Jan 2024). 2019 President of Int. MGB-OAGB-Club. 52 Pubmed-registered publications, >400 presentations. >5000 bariatric and >300 postbariatric plastic surgeries.