Jean is an alumnus of the ENS Cachan, he has passed aggregation in Chemistry before moving to INSA of Rouen as assistant professor in organic chemistry in the Laboratory of Macromolecular Substances, managed by Professor Maréchal. In 1991 he moved at the Faculty of Pharmacy of Montpellier in the CRBA (Research Center on Artificial Biopolymers) team, managed par Dr Michel Vert. From 2007 to 2018 he managed the “Artificial Biopolymers” department of IBMM (Max Mousseron Institute on Biomolecules). His research skills are mainly dedicated to the chemical modifications of biodegradable and biocompatible (co)polymers, especially (co)polyesters, for applications in Health, such as implantable polymeric medical devices or polymeric drug vectors.