Leonard S. Schleifer, M.D. and PhD

Leonard S. Schleifer, MD, PhD, founded Regeneron Pharmaceuticals in 1988 while serving as an Assistant Professor of Neurology at Weill Cornell Medical College. Leveraging a lifelong passion for science and an entrepreneurial spirit, he has served as a director, its president and chief executive officer since its inception and acted as chairman of the board from 1990 through 1994. Schleifer received his MD and PhD in Pharmacology from the University of Virginia, and he is a licensed physician certified in neurology by the American Board of Psychiatry and Neurology