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. Perform technical work that requires the diversified application of engineering principles, theories, concepts, and techniques to the detailed design, development and integration of Test Equipment designs used to support the integration/certification and acceptance testing of electronic assemblies, subassemblies, and systems of varying technologies.