He was the United States Deputy Attorney General, serving in President George W. Bush's administration. As Deputy Attorney General, Comey was the second-highest-ranking official in the United States Department of Justice (DOJ) and ran the day-to-day operations of the Department, serving in that office from December 2003 through August 2005. He was U.S. Attorney for the Southern District of New York prior to becoming Deputy Attorney General.
In December 2003, as Deputy Attorney General, Comey appointed the U.S. Attorney in Chicago, close friend and former colleague Patrick Fitzgerald, as Special Counsel to head the CIA leak grand jury investigation after Attorney General John Ashcroft recused himself. In August 2005, Comey left the DOJ and he became General Counsel and Senior Vice President of Lockheed Martin. In 2010, he became General Counsel at Bridgewater Associates. In early 2013, he left Bridgewater to become Senior Research Scholar and Hertog Fellow on National Security Law at Columbia Law School. He also joined the London-based board of directors of HSBC Holdings.