He teaches and writes in the areas of health law, administrative law, and regulatory theory. Bagley’s work has appeared in the Harvard Law Review, the Columbia Law Review, the Georgetown Law Journal, and the Journal on Health Politics, Policy and Law. Before joining the law school in 2010, he was an attorney with the Appellate Staff in the Civil Division at the U.S. Department of Justice. Bagley served as a law clerk to Justice John Paul Stevens of the U.S. Supreme Court and Judge David S. Tatel of the U.S. Court of Appeals for the D.C. Circuit. Prior to earning his law degree at New York University Law School, he joined Teach For America and taught eighth-grade English at a public school in the South Bronx.