William "Mac" Thornberry

Fall 2021
Resident Fellow
Mac Thornberry IOP Fall 2021 Fellow

Mac Thornberry is a former chairman of the Armed Services Committee in the U.S. House of Representatives, where he represented the 13th district of Texas for 26 years.  He was also a member of the House Intelligence Committee for more than a decade.

Widely respected as an innovator and a strategic thinker, Mac has consistently been on the leading edge of critical national security issues. He led in creating the National Nuclear Security Administration to improve management of the nation’s nuclear weapons complex; establishing the Department of Homeland Security, introducing a bill to do so six months before the attacks of 9/11; preparing the military to defend the nation in new domains of warfare such as space and cyber; and improving oversight of sensitive military and cyber operations. 

While leading the Armed Services Committee, Mac focused on enhancing DOD innovation to the benefit of the warfighter and restoring the readiness of America’s armed forces.  He has been steadfast in his support for the men and women who serve and their families.

Currently, he is involved in advising various companies and organizations on national security issues.

Mac served in the State Department, as staff on Capitol Hill, and practiced law. Raised on the family ranch in Donley County, Texas, Mac graduated from Texas Tech University and received a law degree from the University of Texas. He and his wife, Sally, have two children.

Disclaimer: This information is accurate for the time period that this person was affiliated with the Institute of Politics.