Didier possesses extensive expertise in designing, developing, and optimizing injectable formulations for biotherapeutics and vaccines, encompassing both liquid and lyophilized forms. Following 15 years of spearheading physical characterization and biophysics studies at Sanofi, he transitioned to vaccine R&D in 2011. In his current role, he oversees an automated laboratory platform dedicated to novel vaccine formulation development and facilitates a Stability Modeling user group within Sanofi. As a Principal Scientist, Didier mentors emerging talents, leads a research team, and serves as a lecturer at various universities. His significant contributions to the field include numerous publications in peer-reviewed journals focusing on pharmaceutical formulations, as well as active participation in international Expert Working Groups over the past decade.