About BAE Systems Electronic 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. Utilize Gantt, network diagram, milestone charts, earned value management and other project management techniques to gauge progress and identify performance variances to facilitate focus and intervention in critical areas.