Michel Bourguignon is a French Medical Doctor (1978) specialist in nuclear medicine (1983), a PhD in Physics (1995) and a university Professor of Biophysics and Nuclear Medicine and Hospital Practitioner (1996). He is now Professor Emeritus of the University of Paris Saclay, medical director of INSERM UMR 1296 and Editor in chief of the peer review journal Radioprotection. From 1978 to 1980, Michel Bourguignon followed a post-doctoral research fellowship at the Johns Hopkins University Hospital in Baltimore, United States. From 1981 to 1996, Michel Bourguignon was a nuclear medicine physician and tenured researcher at the French Atomic Energy Commission (CEA), assigned to the Frédéric Joliot Hospital department (SHFJ) in Orsay. In 1996, Michel Bourguignon joined the Faculty of Medicine of Paris Ile-de-France Ouest as the head of the biophysics department with the position of Medical Director at the Office for Protection against Ionizing Radiation of the Ministry for Health and the Ministry of Labor. In 2002, he became Deputy Head of the Nuclear safety authority (Autorité de sûreté nucléaire – ASN) and then nominated by the President of France as a ASN commissioner in 2006 till 2014. Michel Bourguignon has been active in different scientific bodies: SFMN, SFRP, EANM, UNSCEAR, ICRP. He is a French Delegate to the Scientific and Technical Committee of Euratom. Michel Bourguignon has published more than 150 scientific articles in peer review journals and 21 chapters for scientific books. He also holds 3 patents. In 1990 Michel Bourguignon was awarded the International Jean Debiesse Prize.