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Fay Twersky

Director, Effective Philanthropy Group

Fay Twersky is Director of the Effective Philanthropy Group at the William and Flora Hewlett Foundation. In that capacity, she oversees five functions including cross-foundation strategy support, evaluation and organization learning as well as grantmaking in support of organizational effectiveness and a strong philanthropic sector. Twersky spent the prior year working in Jerusalem, advising Yad Hanadiv (the Rothschild Family Foundation) on issues of strategy, organization and measurement.   

Twersky served for four years as a Director and member of the leadership team of the Bill & Melinda Gates Foundation, designing and developing their Impact Planning & Improvement division.  She was also a founding principal of BTW – Informing Change, a strategic consulting firm.  

Twersky has authored numerous articles and reports, contributing to the Stanford Social Innovation Review, Chronicle of Philanthropy, and Alliance Magazine. Most recently she was principal author of Listening to Those Who Matter Most, the Beneficiaries, Measurement and Evaluation in Israel’s Third Sector and A Guide to Actionable Measurement. Twersky is currently a member of the board of directors for the UBS Optimus Foundation based in Zurich, Switzerland. She holds two bachelor’s degrees in Rhetoric and Middle Eastern Studies from the University of California, Berkeley, and a master’s degree in City Planning from the Massachusetts Institute of Technology.