Robert Spiegel, M.D.

Dr. Spiegel joined PDS’s board of directors following the merger with Edge Therapeutics. He served on Edge’s board of directors since August 2013. He has been an Associate Professor at Weill Cornell Medical College since 2012 and is an Advisor to Warburg Pincus, LLC and the Israeli Biotech Fund. He served as Consultant and Chief Medical Officer of PTC Therapeutics, Inc. from 2011 to 2014. Prior to joining Edge’s board of directors, Dr. Spiegel spent over 25 years at Schering-Plough Corporation, retiring in 2009 from his position as Chief Medical Officer and Senior Vice President of the Schering-Plough Research Institute. Dr. Spiegel serves as a member of the board of directors of Geron Corporation (NASDAQ: GERN), a biotechnology oncology company, where he also serves on the compensation committee. He currently serves as Chairman of Vidac Pharma and on the Board of Neximmune, private biotechnology companies. He was previously a director of Talon Therapeutics, Inc., a biopharmaceutical oncology company, where he also served on the audit committee, and Sucampo Pharmaceuticals where he served on the compensation and nominating and governance committees and Clavis Pharma ASA, a pharmaceutical company based in Oslo, Norway. Dr. Spiegel holds a B.A. from Yale University and an M.D. from the University of Pennsylvania. Following a residency in internal medicine, he completed a fellowship in medical oncology at the National Cancer Institute and held academic positions at the National Cancer Institute and New York University Medical Center. The board of directors of PDS and Edge believe that Dr. Spiegel’s extensive medical experience in biopharmaceutical product development, deep understanding of pharmaceutical research and development, and broad expertise in gaining regulatory approval for drug candidates provide him with the qualifications and skills to serve as a director.