For the ND-05: In addition to the Basic Requirements for this position, your resume must also demonstrate at least one year of specialized experience at or equivalent to the ND-04 (GS-12/13 equivalency) pay band in the Federal service or equivalent experience in the private or public sector.as a professional engineer or scientist leading the execution or direction of projects, systems development efforts, research, or technology initiatives for Undersea Warfare Systems. For the ND-04: In addition to the Basic Requirements for this position, your resume must also demonstrate at least one year of specialized experience at or equivalent to the ND-03 (GS-09/11 equivalency) pay band in the Federal service or equivalent experience in the private or public sector. Specialized experience must demonstrate the following: as a professional engineer or scientist supporting the execution or direction of projects, applying a wide range of theories, concepts, systems development efforts, research, or technology initiatives related to Undersea Warfare Systems design, development, and integration. 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/0800/files/all-professional-engineering-positions-0800.pdf https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/0800/mechanical-engineering-series-0830/ https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/0800/computer-engineering-series-0854/ https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/0800/electronics-engineering-series-0855/ https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/1500/mathematics-series-1520/ https://www.opm.gov/policy-data-oversight/classification-qualifications/general-schedule-qualification-standards/1500/computer-science-series-1550/ 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.