U.S. Leadership

Thomas Grenier

Head of Vaccines, North America

Thomas Grenier is the Head of Vaccines for Sanofi, North America, and a member of the Sanofi Vaccines Executive Committee. He is based in New Jersey, U.S., with responsibility for U.S. and Canada Vaccines Commercial Operations.

Thomas was previously the Head of Vaccines Franchise and Product Strategy at Sanofi. In this position, he led the design and delivery of cross-functional strategic roadmaps, focusing on key disease areas such as Flu, RSV, Pediatric, Meningitis and ExPEC, as well as global marketing, strategy, and market access. He was accountable for global vaccine launches (Beyfortus, Fluzone HD/Efluelda, Vaxelis, Menquadfi) and strategic steering for new products. Driven by a strong commitment to enhancing public health through development of innovative and improved immunization, he and his team were instrumental in designing global marketing strategy for Sanofi’s priority vaccine assets.

Thomas joined Sanofi in 2013 and advanced through several roles of increasing responsibility, leading the vaccines CEO’s office, global supply chain, and later the pediatric product line in the U.S. Earlier in his career, Thomas spent six years at McKinsey & Company, rising to the position of Engagement Manager and leading multiple projects in the pharmaceutical industry and strategy fields.

A French citizen, he holds an MSc in Business from HEC and an MBA from Harvard Business School with distinction. Outside of the office, Thomas is a passionate rock climber and mountaineer.