Steven J. Kafka, Ph.D.

Chief Executive Officer; Partner, Third Rock Ventures

Steve is a partner at Third Rock Ventures, and brings more than 20 years of experience in molecular diagnostics and drug discovery, development and commercialization.


Steve holds a B.A. in economics and political science from Stanford University and a Ph.D. in political economy from Harvard University.

He was most recently president and chief operating officer at Foundation Medicine, Inc., a company dedicated to transforming cancer care by identifying molecular alterations in each patient’s unique cancer and matching them with potential targeted therapies and immunotherapies.

In his role, Steve was responsible for the biopharmaceutical and clinical businesses and had significant impacts on growing revenue and scaling operations, launching products, expanding the product globally, driving key business development relationships and financing the company. Prior to joining Foundation Medicine, Steve served in executive roles at oncology-focused drug discovery and development companies including Aileron Therapeutics, Infinity Pharmaceuticals and Millennium Pharmaceuticals.

Steve is also currently a director of Relay Therapeutics, a drug discovery and development firm focused on protein motion, and of ArcherDx, a molecular diagnostics company dedicated to democratizing genomic cancer testing to local laboratories.

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