 Constellation Pharmaceuticals, Inc., a clinical-stage biopharmaceutical company using its expertise in epigenetics to discover and develop novel therapeutics, today announced that Jeffrey Humphrey, M.D., will join Constellation Pharmaceuticals as Chief Medical Officer. Dr. Humphrey is a medical oncologist with over twenty years experience in drug development. Most recently he was Chief Development Officer at Kyowa Kirin Co., where he oversaw the development of over twenty drug candidates including regulatory submissions leading to three drug approvals in the United States and Europe. 