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. POSITION SUMMARY: Performs complex installation and maintenance, craftwork, involving diagnosis, dismantling, repair, and reassembly of intricate facilities systems, equipment, and mechanisms.