He served as the chief of the Oncology, the European Society of Gastroenterology and the French Club of Endosonography where he served as General Secretary from 1996 – 1998 and President from 1998 – 2000. He was President of the Euro-Eus Society from 2008 – 2013. He was a member of the Board of the French Club of Endosonography in the year 2014. He is also Honorary President of the MENA Society since 2013. Endoscopic ultrasonography is a mixed technique that combines endoscopy and ultrasound. More accurate than CT or MRI, it is a unique tool for the diagnosis of digestive tumors. Dr. Marc Giovannini is among the best specialists in the technique worldwide and has much participated in its development.