GS-7: Applicant must possess at least one (1) year of SE equivalent to the GS-5 grade level. SE is defined as follows: Assisted with the physical installation and maintenance of electronic communication systems. Conducted routine equipment tests; performed basic corrections and/or replacing defective parts. Handled, stored, and inventoried a variety of electronic equipment and components. GS-9: Applicant must possess at least one (1) year of SE equivalent to the GS-7 grade level. SE is defined as follows: Performed physical installation, maintenance, and troubleshooting of electronic communication systems. Performed installations and preventive and corrective (or emergency) maintenance and service work on FM radio systems, data networks, or electronic physical security systems. Inspected equipment for adherence to standards and tolerances.