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Tony Siesfeld

Director, Deloitte & Touche USA


Tony Siesfeld is a director at Monitor Deloitte and a senior leader of Monitor Institute, a practice serving foundations and nonprofits. He has over 25 years of experience in for-profit and for-impact advisory work. Recently, he worked in the areas of impact investing & financing social innovation (with the GIIN, B-Lab, Omidyar Network, New Profit), inclusive business practices (Citi Foundation, Tufts University, USAID) & women’s rights (WWB, ChoiceUSA, MS Foundation). He focuses on social action strategy, measurement and evaluation, and bringing leading practices from for-profit businesses into the social sector. His work has been noted in HBR, the FT, and the Wall Street Journal. He has contributed to publications such as the Journal of Strategic Performance Measurement, and Forbes ASAP, and to the publications of organizations such as Sloan Foundation, the Brookings Institution, and the OECD. Tony has an M.S. in Statistics and a Ph.D. in Psychology from Stanford University.