High Quality Content by WIKIPEDIA articles! Michael Chertoff (born November 28, 1953) was the second United States Secretary of Homeland Security under President George W. Bush and co-author of the USA PATRIOT Act. He previously served as a judge on the United States Court of Appeals for the Third Circuit, as a federal prosecutor, and as assistant U.S. Attorney General. He succeeded Tom Ridge as United States Secretary of Homeland Security on February 15, 2005.