ATCorp is a privately held company that specializes in large-scale computer systems architecture, computer networking, and computer information security. ATCorp is headquartered in Minneapolis, MN, with offices in Washington, DC, Ithaca, NY and Rome, NY.

The Minneapolis office provides engineering services and technology integration products for projects requiring advanced research and development, and specializes in network management, monitoring, and testing for commercial, government, and military customers. In Ithaca, ATC-NY specializes in computer security, reliable systems, and information management.