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. In Command, Control, Communications, Computers, Intelligence, Surveillance, and Reconnaissance Systems(C4ISRS), you'll help develop systems that sense, control, exploit and disseminate actional information to warfighters supporting a variety of missions.