In addition to the Basic Requirements for this position, your resume must also demonstrate at least one year of specialized experience equivalent to the next lower grade level (GS-12/13) or pay band (DP-04) in the federal service or equivalent experience in the private or public sector in order to perform the duties of a Mechanical Engineer. Specialized experiences must include duties of some or all of the following: 1) Providing programmatic support for technical projects, with a strong focus on managing cost, schedule, and ensuring all performance requirements are met; 2) Providing technical mentorship and expert guidance to engineering teams, colleagues, or customers; 3) Demonstrating experience in a customer-facing role, including defining and refining project requirements directly with stakeholders and end-users; 4) Expert-level knowledge of system engineering principles and best practices, including requirements definition, risk identification, and system integration; 5) Expertise in mechanical engineering design concepts, development workflows, and the execution of critical experiments. 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 0830 Series: 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.