Michael Chertoff was the second Secretary of Homeland Security from 2005-2009. He previously served at a United States Circuit Judge of the United States Court of Appeals for the Third Circuit, as a federal prosecutor, as Assistant U.S. Attorney General, and as United States Attorney for the District of New Jersey--one of only two U.S. Attorneys who was not replaced when the Clinton administration took office in 1993. Chertoff is the author of Homeland Security: Assessing the First Five Years. He is today Executive Chairman and Co-founder of The Chertoff Group, a security consulting company, and senior of counsel to the firm of Covington and Burling