Gérard Thiéfin received his MD from the University of Reims Champagne-Ardenne in 1985 and specialized in Hepatology and Gastroenterology. He worked as assistant at the department of Hepato-Gastroenterology, Reims University Hospital, in 1986-1987 then followed a post-doctoral fellowship at the Center for Ulcer Research and Education, University of California School of Medecine, Los Angeles, in 1987-1988. He worked under the direction of PH Guth in a laboratory devoted to the study of mucosal blood flow in gastroduodenal ulcer pathogenesis. After 4 years as assistant and hospital practitioner at the department of Hepato-Gastroenterology of Reims University Hospital, he became professor in Hepatology and Gastroenterology in 1991, then head of the department of Hepato-Gastroenterology from 1998 to 2011 and finally head of a medico-surgical department at Reims University Hospital. Besides, he is teacher-researcher in the unit BioSpecT-EA7506 at the university of Reims Champagne-Ardenne where his research focuses on biomedical applications of vibrational spectroscopy in the field of hepatobiliary cancers and hepatic fibrosis.