Leadership
The foundation’s leaders come from a broad range of backgrounds and have a diversity of expertise and experience that spans science and technology, medicine, public policy, education, communications, law, and business. Our leaders are guided by the foundation’s mission to create a world in which every person has the opportunity to live a healthy, productive life.
Executive Leadership
Chair and Governing Board
Scientific Advisory Committee
Our Scientific Advisory Committee comprises a group of esteemed experts from outside of the foundation who offer a wide range of experiences and perspectives. This group plays an important role in strengthening our work by offering independent assessments of our Global Health Division strategies and helping us evaluate results.
Meet our leaders
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Toni Hoover
Director, Strategy, Planning and Management
Dr. Toni Hoover leads a team that supports the programs and functions with business strategy and operations, portfolio and project management, and engagement with industry and product development partners.
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Vivian Hsu
Deputy Director, Vaccine Development; Deputy Director, Neglected Tropical Diseases
Vivian Hsu oversees business operations for two foundation programs, with responsibilities ranging from day-to-day business management to leading major cross-foundation initiatives.
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Yogan Pillay
Director, HIV & TB Delivery
Yogan Pillay leads the foundation’s efforts to strengthen TB & HIV Program Delivery globally.
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Zameer Brey
Deputy Director, Technology Diffusion
Zameer Brey leads the strategic coordination of the foundation’s approach to the equitable and safe use of artificial intelligence (AI) to advance equity and global health and development outcomes.
Historical Leadership
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Melinda French Gates
Co-chair (2000-2024)
View profile: Melinda French GatesMelinda French Gates is a philanthropist, businesswoman, and global advocate for women and girls. She founded and co-chaired the Gates…
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Warren Buffett
Trustee 2006-2021 (emeritus 2021)
View profile: Warren BuffettWarren Buffett helped shape our vision and developed strategies to address some of the world’s most challenging inequities.
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William Gates Sr.
Co-chair 2000-2020 (d. 2020)
View profile: William Gates Sr.William H. Gates Sr. (d. 2020) guided the vision and strategic direction of the foundation and served as an advocate…
More about the foundation

Our role
For over 25 years, the Gates Foundation has been committed to fighting the greatest inequities in the world.

How we work
We are focused on results. Those that can be measured. And those measured in ways beyond numbers.

Our story
Learn about the origins of the foundation and the values that drive our work.


















