Jonathan Lewis MD, PhD

Dr. Lewis is Chief Executive Officer, Executive Chairman and a Director of ZIOPHARM Oncology (Nasdaq: ZIOP), serving in these capacities since January 2004. Additionally, Dr. Lewis has been Chief Medical Officer since June 2008. From July 1994 until June 2001, Dr. Lewis served as Professor of Surgery and Medicine at Memorial Sloan-Kettering Cancer Center. He has been actively involved in leading translational and clinical research and development in cancer, and is globally recognized by patient advocacy groups. He has received numerous honors and awards in medicine and science, including the ASCO Young Investigator Award, the Kristen Carr Fellowship, and the NIH travelling fellowship in molecular genetics, the Yale University Ohse Award, and the Royal College of Surgeons Trubshaw Medal. He served as Chief Medical Officer and Chairman of the Medical Board at Antigenics, Inc. from June 2000 until November 2003. He served as a director of Delcath systems (Nasdaq: DCTH) from 2007 to 2008. He has served as a Director for private technology companies, the Yale Biotechnology and Pharma Society, and on the Board of POPPA (the Police Organization Providing Peer Assistance) of the New York Police Department (NYPD). He also serves on the Medical Advisory Board of the Sarcoma Foundation of America and on the Scientific Advisory Council of the Board of the Hope Funds for Cancer Research.