In addition to the Basic Requirements for this position, your resume must also demonstrate at least one year of speciliazed experience at or equivalent to the GS-13 grade level or pay band in the Federal service or equivalent experience in the private or public sector. Specialized experience must demonstrate the following: Experience dealing with the reduction and analysis of data produced by astronomical instruments (e.g., USNO telescopes, the Hubble Space Telescope, the Very Large Array, the Very Long Baseline Array, etc.). Experience developing independent assessments and corrections of difficult astrometric/astronomical/defense problems such as precise measurements of the positions and velocities of Near-Earth Objects (NEOs). Experience overseeing and managing major projects designed to provide the astronomical community with the most accurate, precise astronomical and defense-related data available. Experience applying knowledge of the nature of the celestial reference frame (CRF), measurement of CRF and associated stars, Defense applications related to Position, Navigation and Timing (PNT). Experience applying knowledge of Guidance, Navigation and Control (GNC), Indications and Warnings (I&W), space object characterization, and Space Situational Awareness (SSA). Additional qualification information can be found from the following Office of Personnel Management website: https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/#url=List-by-Occupational-Series https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/1300/astronomy-and-space-science-series-1330/ 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.