Full-time staff

Holden Karnofsky | Co-Founder and Co-Executive Director. Holden graduated from Harvard University 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 University 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 College 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 University 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 University 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 University 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 April 2013.

Josh Rosenberg | Research Analyst. Josh graduated from Pomona College in 2013 with a BA in Philosophy and Economics. He joined GiveWell as a Research Analyst in July 2013.

Ben Rachbach | Research Analyst. Ben graduated from Swarthmore College in 2011 with a BA in Chinese and Education Studies. He then spent a year in China as a Fulbright scholar and tutored for a year with the Match Corps in Boston. He joined GiveWell as a Research Analyst in August 2013.

Sean Conley | Research Analyst. Sean graduated from Oxford University in 2012 with a BA in Philosophy, Politics, and Economics. He joined GiveWell as a Research Analyst in June 2013.

Howie Lempel | Research Analyst. Howie graduated from Wesleyan University in 2008 with a BA in Social Studies and Mathematical Economics. He has worked at the Brookings Institution and the Manhattan District Attorney's white collar crime bureau. He is on leave from Yale Law School, where he served as a law clerk at the ACLU National Prison Project and the Orleans Public Defenders. Howie joined GiveWell as a Research Analyst in August 2013.

Jake Marcus | Research Analyst. Jake graduated from Yale University in 2008 with a BA in mathematics and from the University of Washington in 2011 with a Master of Public Health. He has worked at the Institute for Health Metrics and Evaluation on the Global Burden of Disease study and at Practice Fusion, an electronic health record company, on its data science team. He joined GiveWell as a Research Analyst in September 2013.

Shayna Strom | Director, U.S. Policy. Shayna comes to GiveWell from the White House, where she was the Chief of Staff and Senior Counselor at the White House Office of Information and Regulatory Affairs. She previously served as an advisor to the Director of the White House Office of Management and Budget and as Judiciary Committee Counsel to Senator Al Franken. Before joining the U.S. government, Shayna was an organizer with community, political, and labor groups. She has also taught a class on social change at Johns Hopkins University. Shayna has a B.A. from Yale University, a J.D. from Yale Law School, and an M.Sc. from the University of Oxford, where she was a Rhodes Scholar. She joined GiveWell as Director, U.S. Policy in June 2014.

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 (Vice-President) 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 (Treasurer) 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.

Rob Reich is an Associate Professor of Political Science at Stanford University. He is Co-Director of Stanford's Center on Philanthropy and Civil Society and is the Director of its Program on Ethics in Society.