Dr. Greenwood is a neuropsychopharmacologist, who specializes in both the discovery and clinical development of drugs, targeting the central nervous system (CNS). He is a director and co-founder of Marix Drug Development, a United Kingdom-based drug development consultancy and clinical research organization, where he served as chief operations officer between 2001-2004. From 1995 to 1999, David was director, CNS projects, at Shire Pharmaceuticals, and during the previous 25 years, he held various senior positions in Zeneca and the former ICI Pharmaceuticals, including clinical pharmacology studies manager and in-house phase I unit operations manager, CNS clinical projects manager and CNS preclinical project leader. David is an elected fellow of the British Pharmacological Society, the Institute of Biology, the Collegium Internationale Neuropsychopharmacologicum (CINP) and the Royal Society of Medicine. He was awarded a bachelor�s degree (Hons) and doctorate degree in pharmacology from the University of St Andrew�s, Scotland.