Dr. Clark is the Edward LeWinn Professor of Medicine and Director of the Stevens Foundation Parkinson’s Disease Center of Excellence, and from 2008-2021 was Principal Investigator of the National Institutes of Health (NIH) Clinical and Translational Science Award to UTHSCSA. He attended medical school at Columbia University and completed his training at the University of Washington and the NIH. He was previously a professor at University of Washington, Boston University, and University of Iowa, and spent a sabbatical year at University of Geneva.

Dr. Clark’s research focuses on mechanisms of neuro-inflammation, with a goal of developing new therapeutic strategies to halt disease progression in people with Parkinson’s disease (PD).  His work has been funded by NIH, U.S. Department of Veterans Affairs, and several foundations. He has founded two biotechnology companies, one focusing on small-molecule NADPH oxidase (NOX) inhibitors for use in fibrotic diseases and the other for developing a novel neuroprotective stem-cell gene therapy for PD.