Sir Patrick John Thompson Vallance is a British physician, scientist, and clinical pharmacologist who has worked in both academia and industry and has since March 2018 been the Chief Scientific Adviser to the Government of the United Kingdom. From 1986 to 1995 he taught at St George's Hospital Medical School, where his research concentrated on vascular biology and endothelial cell physiology. In 1995 he was appointed professor at UCL Medical School, and in 2002 he became head of its department of medicine. From 2012 to 2018 Vallance served as president of research and development (R&D) at the multinational pharmaceutical company GlaxoSmithKline (GSK). Patrick Vallance leads the UK government program Vaccine Taskforce.