Richard E. Buller, M.D., Ph.D. , has over 15 years of experience leading oncology clinical development and translational medicine departments at major pharmaceutical companies. He has participated in the development of 15 drugs and several companion diagnostics that received U.S. FDA approval. Dr. Buller most recently served as Head Oncology Clinical Development and Vice President of Translational Oncology at Pfizer Inc. ( Pfizer ), one of the world s largest pharmaceutical companies, until he retired in 2016. He had previously served as Vice President of Translational Medicine at Exelixis, a leading biopharmaceutical company, where he led efforts to study patients selected by molecular testing for inclusion in their phase 2 and phase 3 clinical trials. He began his pharmaceutical company career at GlaxoSmithKline as Director of the Oncology Medicine Development Center. Prior to his leadership positions in drug development, he was Professor of Gynecologic Oncology at the University of Iowa, where he led laboratory research focused on identifying genomic variants involved in ovarian cancer. He received his M.D. from the Baylor College of Medicine, where he also received his Ph.D. in cell biology. Among other attributes, skills and qualifications, the Board believes Dr. Buller is uniquely qualified to serve as a director based on his oncology drug and diagnostic development expertise.