S4 Inc. provides Enterprise IT Services, Cybersecurity and Professional Services to Department of Defense (DoD), Department o ... f Homeland Security (DHS) and US Government customers. We use our agility, strategy and insight to deliver leading edge solutions to both peacetime planners and war fighters within scope, schedule and budget. Headquartered in Bedford, MA, S4 has offices in Colorado Springs, CO; Dayton, OH; Huntsville, AL; and Omaha, NE as well as several project sites across the United States. S4 Inc. is a Small Disadvantaged Business (SDB) with an ISO 9001:2015 certification. read more