S4 Inc.
IT Services and IT ConsultingMassachusetts, United States51-200 Employees
S4 Inc. is a mid-sized IT services and consulting firm that provides enterprise IT services, cybersecurity, and professional support to U.S. government customers, including the Department of Defense. It emphasizes agility and strategic insight to develop solutions for both planning and operations, working within defined scope, schedule, and budget. Headquartered in Bedford, Massachusetts, S4 operates at multiple sites across the United States, including Colorado Springs, Huntsville, Ogden, Omaha, and the Washington, D.C. area. As a Small Disadvantaged Business, S4 holds ISO 9001:2015, ISO 27001:2013, and ISO/IEC 20000-1:2018 certifications, underscoring its commitment to quality and information security management. Its customer base comprises DoD and other U.S. government agencies seeking IT services, cybersecurity, and professional support. In 2025, S4 was acquired by Knexus Research Corporation, an artificial intelligence company, marking a significant recent development in its corporate status.