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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Thong Le
Investment Director, Managing Partner
Thong Q. Le serves as Investment Director and Managing Partner of the Strategic Investment Fund (SIF), the impact investment arm responsible for using equity, debt, and guarantee investment tools to further the philanthropic goals of the organization.
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Thushan Wijesinghe
Director, Enterprise Data Solutions
Thushan Wijesinghe leads the foundation’s enterprise data strategy, knowledge management, data science and insights work in support of the organization’s program teams and global country offices.
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Tim Herron
Deputy Director, Pathways Navigation
Tim Herron leads the Washington State team’s efforts to improve postsecondary enrollment among students who face the highest barriers, by fostering regional partnerships, increasing adoption of effective solutions, and improving data ecosystems.
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Tim Petersen
Deputy Director, GPEI Global Program Support & Advisory Groups, Polio
Tim Petersen works closely with the Global Polio Eradication Initiative, countries and across foundation teams to support country operations and ensure technical strategies and resources in place to achieve polio eradication.
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Tom Tierney
Board Member
Tom Tierney co-founded The Bridgespan Group, an independent global nonprofit focused on helping philanthropists and nonprofit leaders achieve breakthrough results.
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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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Toni Hoover
Director, Global Health (Seattle office) Programs Connect 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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Tracey McNeill
Director, Primary Health Care
Tracey McNeill leads a team that works to dramatically improve the efficiency, quality, and equity of primary health care by building on the deep experience of the foundation and its partners in health systems strengthening, health system design, and service delivery innovation.
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.


















