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Secretary of Defense

Jim Mattis

Jim Mattis became the 26th defense secretary Jan. 20, 2017. During more than four decades in uniform, he commanded Marines at all levels, including in combat tours in Iraq and Afghanistan. Following his retirement from the U.S. Marine Corps in 2013, Secretary Mattis served as the Davies Family Distinguished Visiting Fellow at the Hoover Institution at Stanford University, specializing in the study of leadership, national security, strategy, innovation and the effective use of military force.

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Defense Secretary Jim Mattis speaks during a news conference with Marine Corps Gen. Joe Dunford, chairman of the Joint Chiefs of Staff, at the Pentagon, May 19, 2017. Mattis and Dunford updated reporters on the fight against the Islamic State of Iraq and Syria. DoD photo by Army Sgt. Amber I. Smith
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Defense Secretary Jim Mattis and former Defense Secretary Chuck Hagel unveil Hagel’s official Pentagon portrait during a ceremony in Washington, May 19, 2017. Hagel served as the 24th Secretary of Defense from February 2013 to February 2015. DoD photo by Air Force Tech. Sgt. Brigitte N. Brantley
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