Mark S. Zaid is an American attorney, based in Washington, D.C., with a practice focused on national security law, freedom of speech constitutional claims, and government accountability. In 1998 he founded the James Madison Project, an organization dedicated to reducing government secrecy. It is interested in the Freedom of Information Act and government whistleblowers. He is co-editor of Litigation Under the Federal Open Government Laws. He is the co-founder of a legal organization called Whistleblower Aid, intended to help whistleblowers forward their concerns without incurring legal liability.