Leadership Team

Cari Tuna

Managing Director

Cari Tuna co-founded Good Ventures with her husband Dustin Moskovitz (co-founder of Facebook and Asana) in 2011 and is the foundation’s President. She helps set the strategy and oversee the work of the Open Philanthropy Project, which is the primary basis for Good Ventures’ grant decisions. Previously, Cari was a reporter for The Wall Street Journal, where she covered a range of topics, including corporate management, the California economy and enterprise technology. She has a B.A. from Yale University in Political Science.

Holden Karnofsky

Managing Director

Holden Karnofsky helps set the strategy and oversee the work of the Open Philanthropy Project, in addition to leading the Project’s preliminary investigation of funding opportunities in scientific research. Holden has a degree in Social Studies from Harvard University and spent several years in the hedge fund industry before co-founding GiveWell in mid-2007.

Elie Hassenfeld

Co-Founder and Co-Executive Director, GiveWell

Elie Hassenfeld leads the Open Philanthropy Project’s History of Philanthropy Program, which aims to better understand philanthropy’s past track record. Elie has a degree in Religion from Columbia University and spent several years in the hedge fund industry before co-founding GiveWell in mid-2007.

Alexander Berger

Program Officer, US Policy

Alexander Berger leads the Open Philanthropy Project’s investigations of U.S. policy causes and helping to set the overall strategy of the Project. He has also contributed to the Project’s investigations of potential focus areas related to reducing global catastrophic risks. He has a B.A. in Philosophy from Stanford University and an M.A. in Policy, Organization, and Leadership Studies from Stanford’s School of Education. He joined GiveWell in July 2011.

Howie Lempel

Program Officer, Global Catastrophic Risks

Howie Lempel leads the Open Philanthropy Project’s investigations of potential focus areas related to reducing global catastrophic risks. He has also contributed to the Project’s investigations of U.S. policy causes. Howie has a B.A. in Social Studies and Mathematical Economics from Wesleyan University. 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 in August 2013.