Your resume must also demonstrate at least one year of specialized experience at or equivalent to the GS-11 grade level or pay band ND-03 in the Federal service or equivalent experience in the private or public sector. Specialized experience must demonstrate the following: Developing, integrating and/or testing of electronic systems, with emphasis on navigation technologies including Global Positioning System (GPS) receivers, anti-jam antennas, Inertial Navigation Systems (INS), and alternative navigation sensors. Additional qualification information can be found from the following Office of Personnel Management website: 0801/0855 - https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/0800/files/all-professional-engineering-positions-0800.pdf Experience refers to paid and unpaid experience, including volunteer work done through National Service programs (e.g., professional, philanthropic, religious, spiritual, community, student, social). Volunteer work helps build critical competencies, knowledge, and skills and can provide valuable training and experience that translates directly to paid employment.