Leidos Holdings Inc is a technology, engineering, and science company that provides services and solutions in the defense, intelligence, civil, and health management, both domestically and internationally. The customers of the company includes the U.S. Department of Defense ("DoD"), the U.S. Intelligence Community, the U.S. Department of Homeland Security ("DHS"), the Federal Aviation Administration ("FAA"), the Department of Veterans Affairs ("VA"), and many other U.S. civilian, state and local government agencies, etc. The company is engaged in four reportable segments; National Security & Digital, Health & Civil, Commercial & International and Defense Systems. It provides a wide array of scientific, engineering and technical services and solutions across these reportable segments.