Melissa G. Dalton has over 20 years of experience in U.S. defense, aerospace, and national security affairs. She served as the 28th under secretary of the Air Force. She was responsible for organizing, training, and equipping the U.S. Air Force and Space Force, overseeing an annual budget exceeding $200 billion, and accountable for the welfare of nearly 700,000 active-duty, guard, reserve, and civilian Airmen, Guardians, and their families. Ms. Dalton performed the duties of deputy under secretary of defense for policy from December 2023 to May 2024, when she served as the principal advisor to the secretary of defense on the formation of national security and defense policy. Additionally, she served as the assistant secretary of defense for homeland defense and hemispheric affairs from March 2022 to May 2024. She joined the Biden administration in January 2021 as the principal deputy assistant secretary of defense for strategy, plans, and capabilities. From 2014 to 2021, Ms. Dalton led research and analysis at the Center for Strategic and International Studies, including directing the Cooperative Defense Project and serving as deputy director and senior fellow in the International Security Program. Ms. Dalton served for more than a decade as a career civil servant in the Bush and Obama administrations within the Department of Defense. Ms. Dalton is a recipient of the Department of Defense Distinguished Public Service Medal. She was a Council on Foreign Relations International Affairs fellow and is a member of the Council on Foreign Relations. She is a Non-Resident Senior Advisor at the Center for Strategic and International Studies and is the Principal of Potomac River Strategies, LLC.