ATK Aerospace Structures is a branch of ATK Mission Systems, a division of Alliant Techsystems, which provides technology-based systems, equipment and components. Alliant Techsystems operates through various divisions, including Energetic Systems, Civil Ammunition, Medium Caliber Systems, New River Energetics and Lake City Ammunition. It also offers research and development, design and manufacturing services. ATK Mission Systems is a manufacturer of weapons, ammunition and space systems. It offers product development, testing, sampling, launching and technical support services. The company employs more than 16,500 individuals and operates through authorized representatives. It has offices in more than 60 locations worldwide. ATK Aerospace Structures maintains a location in Luka, Miss.