Mark Barnes is an attorney and advocate. Barnes is an expert on public healthcare law. He was Director of Policy for the New York State Department of Health AIDS Institute, and Associate Commissioner for Medical and Legal Policy for the New York City Department of Health under the mayoralty of David Dinkins. He worked on the National Health Care Reform Task Force in the Clinton Administration. His work includes focus on the fields of research compliance, the ethics of clinical trials, and medical privacy. He is currently a partner with the law firm of Ropes & Gray and President-Elect of the New York State Bar Association's Health Law Section.