The 638th Electronic Systems Squadron is a unit of the United States Air Force, specifically under the Air Combat Command (ACC). Its primary role involves the research, development, engineering, and integration of electronic systems for various platforms across the Department of Defense. This squadron contributes significantly to maintaining the technological edge of the U.S. military in areas such as electronic warfare, cyber, space, intelligence, surveillance, and reconnaissance. The 638th ESS is stationed at Peterson Air Force Base, Colorado Springs, Colorado.