1999-2001 - Chief of Staff to then-CIA Director George Tenet.
March 2001-March 2003 - CIA Deputy Executive Director.
March 12, 2003-December 6, 2004 - Founding director of the Terrorist Threat Integration Center.
October 2004-August 2005 - Interim Director of the National Counterterrorism Center.
November 2005-January 2009 - President and CEO of The Analysis Corporation.
2008 - Intelligence adviser to then-Sen. Barack Obama during his presidential campaign.
January 20, 2009-present - Assistant to President Barack Obama for Homeland Security and Counterterrorism.
January 7, 2013 - Nominated by President Barack Obama to be director of the CIA.
February 7, 2013 - Testifies before the Senate Intelligence Committee as part of his confirmation hearings.
March 7, 2013 - Confirmed by the Senate, 63-44.
March 8, 2013 - Brennan sworn in as director.