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. Our C4ISR team plays a key role in the military defense and operational stability of governments, businesses, and societies worldwide today, and indications are that it will only become more important moving forward, given its growing role in how decisions are made, threats are addressed, and agreements are enforced.