Darrel P. Cohen, M.D., Ph.D.

Darrel P. Cohen, M.D., Ph.D. joined Viracta Therapeutics in August 2023 as Chief Medical Officer. Dr. Cohen is a hematologist/oncologist with over 25 years of oncology clinical research and drug development experience. Prior to Viracta, Dr. Cohen was Chief Medical Officer of Cell Therapy at Athenex Inc., where he led clinical development, clinical operations, and regulatory affairs for its CAR-NKT cell therapy platform and was instrumental in accelerating clinical development plans for investigational products, KUR-501 and KUR-502. Prior to this, Dr. Cohen was Chief Medical Officer at Biosight Pharmaceuticals and Head of Clinical Development at EUSA Pharma. He has held leadership positions of increasing responsibility at Pharmacia, Sanofi-Aventis, and Pfizer, including Vice President of Late-Phase Clinical Development at Pfizer Oncology where he was involved in multiple successful regulatory submissions of new targeted cancer drugs such as SUTENT® (sunitinib), XALKORI_^® (crizotinib), and IBRANCE^® (palbociclib). Dr. Cohen received his M.D. and Ph.D. degrees in Medicine and Microbiology from Boston University School of Medicine, trained as a resident in Internal Medicine at Georgetown University Medical Center, and completed a fellowship in Hematology/Oncology at Duke University Medical Center.