Robert J. Castelli (born December 16, 1949) is an American security consultant, professor and media personality from Goldens Bridge, New York. He served two terms as a member of the New York State Assembly, representing northeastern Westchester County, New York. During the Vietnam War, he served with the 7th Cavalry Regiment in the United States Army. Upon his separation from military, he became a member of the New York State Police, where he served with the elite Special Investigations Unit and the New York State Organized Crime Task Force for over two decades.