May be required to do some: Electronic modules programming, lay out, build, test, troubleshoot, repair, and modify developmental electronic components, parts, equipment, and systems, such as computer equipment, test equipment, and machine tool numerical controls, applying principles and theories of electronics, electrical circuitry, engineering mathematics, electronic and electrical testing, and physics. This includes harness design and pin mapping (similar to reverse engineering), as well as building and testing wiring harnesses, troubleshooting, repairing, and modifying electrical wiring where necessary and applying principles and theories of electronics, electrical circuitry, and electronic and electrical testing.