THERESA WHELAN assumed the duties as the Principal Deputy Assistant Secretary of Defense for Homeland Defense and Global Security (HD&GS) as of July 10, 2017. She is a career member of the Senior Executive Service, having previously Performed the Duties of the Under Secretary of Defense for Policy. In this capacity she advised the Secretary of Defense on all matters pertaining to the development and execution of U.S. national defense policy and strategy. From March 2016 through January 2017, Ms. Whelan served as the Acting Assistant Secretary of Defense for Special Operations and Low Intensity Conflict (SO/LIC). Ms. Whelan has over thirty years of experience in the defense intelligence, defense policy and national intelligence communities. She has a Master of Arts in national security studies from Georgetown University and a Master of Science in national security strategy from the National War College.
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