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Secretary of Defense

James N. Mattis

James N. 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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U.S. Merchant Marine Academy graduates celebrate at the end of their graduation ceremony in Kings Point, New York, June 16, 2018. Defense Secretary James N. Mattis delivered the commencement address, reminding the incoming Merchant Marine officers to always remember the lessons learned at the academy, especially when facing obstacles in the often dangerous and challenging maritime industry. U.S. Merchant Marine Academy Alumni photo
Mattis to Grads: Use Lessons Learned to Avert Maritime Dangers Story | Mattis Remarks | Full Event | Transcript
Defense Secretary James N. Mattis addresses U.S. Naval War College class of 2018 graduates during a commencement ceremony in Newport, R.I., June 15, 2018. Navy photo by Petty Officer 2nd Class Jess Lewis
Grads Will Tackle Today's Security Challenges, Mattis Says Story | Mattis Remarks | Transcript