About BAE Systems Space & Mission Systems BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Practical experience operating within a Lean Management System, including daily management, strategy deployment (Hoshin Kanri), and structured problem solving to improve execution, develop people, and make problems visible.