He has worked for 30 years in the public and private healthcare sectors and most recently left a 15 year post as Chief Medical and Chief R&D Officer for Medco, the pharmacy benefits manager for 65 million lives, where he managed a global department of over 2000 researchers in 33 offices. While there, Dr. Epstein led the $720 million acquisition of a global market access company, and subsequently led 5 additional tuck-in acquisisions.