ECS is a leading provider of system engineering and information technology services and solutions to Federal Government agencies. As an externally assessed CMMI Level 3 company and an ISO 9001:2008- registered company, ECS’ award-winning expertise and commitment to quality services are critical in meeting the mission of Federal agencies in serving the needs of the American people. Headquartered in Fairfax, Virginia, ECS has 8 office locations throughout the U.S.