Mark Montgomery serves as the Executive Director of the Cyberspace Solarium Commission. He most recently served as Policy Director for the Senate Armed Services Committee under the leadership of Senator John S. McCain. In this position he coordinated policy efforts on national defense strategy, capabilities and requirements, defense policy and cyber issues. Mark served for 32 years in the U.S. Navy as a nuclear trained surface warfare officer, retiring as a Rear Admiral in 2017. His flag officer assignments included Director of Operations (J3) at U. S. Pacific Command; Commander of Carrier Strike Group 5 embarked on the USS George Washington stationed in Japan; and Deputy Director, Plans, Policy and Strategy (J5), at U. S. European Command. He was selected as a White House Fellow and assigned to the National Security Council, serving as Director for Transnational Threats from 1998-2000. Mark graduated from the University of Pennsylvania with bachelor’s and master’s degrees in history. He subsequently earned a master’s degree in history from Oxford University, and completed the U.S. Navy’s nuclear power training program.