Lieutenant Colonel Markus Lewis is an Army Strategist specializing in the development and implementation of national strategic plans and policies, theater strategy, and operational planning. He has served under US Army Central as a Strategic Plans Officer and a Senior Strategist in the Office of the Chief, Army Reserve. Markus joins ISD from the Joint Staff, where he served as a Joint Doctrine Strategic Planner developing policy options for the Chairman of the Joint Chiefs of Staff on issues regarding joint doctrine.