The 642nd Electronic Systems Squadron (ESS) is a unit of the United States Air Force (USAF) that operates under the Air Force Life Cycle Management Center (AFLCMC), specifically within the Electronic Warfare, Sensors, and Systems Directorate (ESW). The squadron’s primary mission involves the research, development, test, and engineering of electronic warfare systems to counter threats and ensure the USAF maintains operational superiority. It is stationed at Eglin Air Force Base in Florida. The 642d ESS contributes significantly to the defense and technological advancement of the USAF by providing innovative solutions for various electronic warfare needs.