 He is the chairman of Compugen (Israeli company), Evogene, Keddem Bioscience, Mada Ltd.

Gerstel is the co-founder and co-chairman of Itamar Medical, and serves as a director of Yissum Research Development Company of Hebrew University Ltd., Yeda Ltd. and the Foundation for the U.S. National Medals of Science and Technology.Gerstel is a member of the Board of Governors and the Executive Committee of the Weizmann Institute of Science and the Board of Governors of The Hebrew University of Jerusalem.He is an advisor to the Burrill Life Science Funds and the board of the Israel-U.S. Binational Industrial Research and Development Foundation ("BIRD").