| Member of the European Expert Panel for sacral nerve stimulation since 2005 |
| Member of the European Expert Panel for stapled transanal rectal resection since 2006 |
| Secretary, examiner and treasury of the Division Colo-Proctology in the European Union of Medical Specialists (USME) since 2007 |
| President of the Swiss study group of Sacral Neuromodulation since 2008 to 2012 |
| President of the Swiss working group of Coloproctology 2013 – 2014 |
| Swiss visceral surgeons since 1996 | Member oft he board 2013-2019 |
| German Society for Surgery since1998 |
| Swiss Society of Surgery since 1995 |
| Swiss Association for Laparoscopic and Thoracoscopic Surgery since 1998 |
| Swiss Society of Gastroenterology und Hepatology since 1998 |
