The Engineering Technician D is a highly developed technical contributor who performs advanced work across electronic, mechanical, electromechanical, and optical systems, with a strong emphasis on testing, troubleshooting, fault isolation, and system performance verification. Working from schematics, engineering drawings, manuals, test procedures, and written or verbal instructions, you will use a wide range of test and diagnostic equipment to identify issues, analyze system behavior, isolate root causes, and verify proper operation and performance.