Guillaume Leroy is the founder of Global Life Science Advisory, a company dedicated to supporting Executive teams and Boards in the Life Sciences Fields.

Dr. Leroy is an accomplished scientific leader with extensive experience in commercial operations, where he has demonstrated a strong ability to deliver financial growth and public health impact in diverse business settings around the globe. Dr. Leroy also brings a strong track record of transforming organizations, developing talents, managing breakthrough scientific innovations, and navigating highly complex public health and political environments in both developed and emerging countries.

Dr. Leroy served as President of Sanofi France from 2017 to 2020, where he developed and executed a Societal Impact Strategy Roadmap to guide the transformation of 25,000 employees with unions, authorities, and professional organizations. Prior to that, he led a cross-functional R&D and Marketing team to successfully develop and market the first vaccine against dengue fever.

Dr. Leroy started his career at Sanofi Pasteur in Brazil, where he successfully launched the company’s first flu vaccination program before taking on growing P&L accountability at both country and regional levels in Africa, French Overseas Territories, and Latin America. Under his leadership and public health focus, Sanofi Pasteur Latin America became the leading vaccine company in the region, recognized for having set successful strategic industrial partnerships with state-owned companies in both Brazil and Mexico, as well as providing H1N1 pandemic response by supplying vaccines for 20% of the whole population of Latin America.

Dr. Leroy received his PhD in Pharmaceutical Sciences from the Université de Rouen, at Rouen, France and his Marketing Masters from ESCP Business School in Paris.