Full-time staff

Holden Karnofsky | Co-Founder and Co-Executive Director. Holden graduated from Harvard in 2003 with a degree in Social Studies, and spent the next several years in the hedge fund industry. He co-founded GiveWell in mid-2007.

Elie Hassenfeld | Co-Founder and Co-Executive Director. Elie graduated from Columbia in 2004 with a degree in Religion, and spent the next several years in the hedge fund industry. He co-founded GiveWell in mid-2007.

Natalie Crispin | Research Analyst and Financial Manager. Natalie graduated from Swarthmore in 2009 with a degree in Economics. She joined GiveWell as a Research Analyst in July 2009.

Alexander Berger | Senior Research Analyst. Alexander graduated from Stanford in 2011 with a BA in Philosophy and an MA in Policy, Organization, and Leadership Studies from the School of Education. He joined GiveWell as a Research Analyst in July 2011.

Eliza Scheffler | Research Analyst. Eliza graduated from Yale in 2012 with a BA in American Studies. She joined GiveWell as a Research Analyst in July 2012.

Timothy Telleen-Lawton | Research Analyst. Timothy graduated from Stanford in 2006 with a BS and MS in Earth Systems. He worked with Frontier Group and Environment America until he started with Gen110 in 2011. He joined GiveWell as a Research Analyst in 2013.

Board of Directors

Tom Rutledge (Chair) is in the Structured Credit Group at Magnetar Capital, an Evanston, Illinois-based alternative investment manager. During his career, he has also worked in capital markets businesses at JPMorgan, Deutsche Bank, and Merrill Lynch.

Holden Karnofsky (Secretary) see bio above.

Elie Hassenfeld see bio above.

Greg Jensen is co-Chief Investment Officer at a major hedge fund, the former supervisor of both Holden and Elie, and one of our project's major financial supporters.

Tim Ogden is the former Chief Knowledge Officer of Geneva Global, a philanthropic consulting firm devoted to results-oriented grantmaking in the poorest regions of the world. He currently is managing director of the Financial Access Initiative at NYU and an Executive Partner at Sona Partners, a thought leadership communications firm.

Cari Tuna is the head of Good Ventures, a San Francisco-based charitable foundation.

Phil Steinmeyer spent much of his career in the software industry (primarily games), including founding PopTop Software. He is now an investor.

Brigid Slipka is a fundraiser and a writer based in Washington, DC. She has over ten years experience in nonprofit management and philanthropy.