Our Customers The following is a partial list of S4 customers. Please contact us for detailed past performance history. Department of Defense NORAD and US Northern Command (N&NC)US Cyber Command (USCYBERCOM)US Strategic Command (USSTRATCOM)Joint Center for Electromagnetic Readiness (JCER)Joint Electromagnetic Warfare Center (JEWC)Joint Staff / Deputy Directorate for ISR Operations (JS/J32) US Air Force AF Life Cycle Management Center (AFLCMC)AF Research Laboratory (AFRL)Air Force Space Command (AFSPC)Air Mobility Command (AMC) US Army Logistics Data Analysis Center (LDAC) US Senate