Catherine Stehman-Breen, M.D.
Former Chief Executive Officer, Chroma Medicine
Catherine Stehman-Breen, M.D., has served as a member of our board of directors since June 2020. From December 2020 to January 2025, Dr. Stehman-Breen served as the Chief Executive Officer and a member of the board of directors of Chroma Medicine until its merger with Nvelop Therapeutics in January 2025. Previously, she served as the Chief Research and Development Officer of Obsidian Therapeutics, Inc., a private biotechnology company, from July 2019 to December 2020, and as an entrepreneur-in-residence at Atlas Ventures, serving as Chief Medical Officer of both Dyne Therapeutics, Inc., a biotechnology company, from March 2018 to July 2019 and Disarm Therapeutics, Inc., a biotechnology company, from April 2018 to July 2019. Dr. Stehman-Breen also served as Chief Medical Officer of Sarepta Therapeutics, Inc., a publicly traded biopharmaceutical company, from March 2017 to December 2017. Prior to that, she served as Vice President, Clinical Development and Regulatory Affairs at Regeneron Pharmaceuticals, Inc., a publicly traded biotechnology company, from January 2015 to March 2017. From 2003 to 2015, Dr. Stehman-Breen held senior leadership roles at Amgen, Inc. including Vice President, Global Development, leading the neuroscience, nephrology and bone therapeutic areas. She has also served on the boards of directors of Dyne Therapeutics, Inc. since June 2019 and Generation Bio Co., a publicly traded biotechnology company, since December 2017. Dr. Stehman-Breen earned a B.A. in biology and psychology from Colby College, an M.S. in epidemiology from the University of Washington, where she also completed her residency and fellowship training, and an M.D. from the University of Chicago.