Under supervision, performs routine technical functions related to the support of development engineering activities such as design, test, checkout, fabrication, modification, and assembly of electronics and Electro-mechanical systems, experimental design circuitry, prototype models, or specialized test equipment . Under supervision, performs routine technical functions related to the support of development engineering activities such as design, test, checkout, fabrication, modification, and assembly of electronics and Electro-mechanical systems, experimental design circuitry, prototype models, or specialized test equipment.