Steven J. Mento, Ph.D., joined Histogen’s board of directors in May 2020 following the company’s merger with Conatus Pharmaceuticals. He was a co-founder of Conatus and served as President and Chief Executive Officer and as a member of its board of directors since July 2005. From July 2005 until December 2012, Dr. Mento also served as chairman of Conatus’ board of directors. Dr. Mento has over 30 years of combined experience in the biotechnology and pharmaceutical industries. From 1997 to 2005, Dr. Mento was President, Chief Executive Officer and a member of the Board of Directors of Idun Pharmaceuticals, Inc. Dr. Mento guided Idun during its transition from a discovery focused organization to a drug development company with multiple products in or near human clinical testing. In April 2005, Idun was sold to Pfizer Inc. Previously, Dr. Mento served as President of Chiron Viagene, Inc. (subsequently Chiron Technologies, Center for Gene Therapy), and Vice President of Chiron Corporation from 1995 to 1997. Dr. Mento was Vice President of R&D at Viagene from 1992 to 1995. Prior to Viagene, Dr. Mento held various positions at American Cyanamid Company from 1982 to 1992. His last position was Director of Viral Vaccine Research and Development at Lederle-Praxis Biologicals, a business unit of American Cyanamid. Dr. Mento currently serves on the board of directors of BIOCOM and various academic and charitable organizations. He previously served on the boards of BIO, BIO ECS, BIO Health Section Governing Body, and Sangamo Biosciences, Inc. Dr. Mento holds a Ph.D. and M.S., both in Microbiology, from Rutgers University, and a B.A. in Microbiology from Rutgers College.