Dr. Greenberg is a Medical Safety Officer for Janssen Pharmaceuticals R&D, and Adjunct Associate Professor in the Department of Pharmacology & Experimental Therapeutics of Thomas Jefferson University. He is a Clinical Pharmacologist with education and experience in chemical engineering, business, and clinical research. He's been an Investigator of more than 130 early phase clinical trials from ~30 sponsors, and authored ~60 papers, and has been active in DIA, ASCPT, ACCP, ACPU, CTTI and USP.