Your resume must also demonstrate at least one year of specialized experience at or equivalent to the NH-03 (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: As a professional engineer, managed engineering personnel and oversaw the development, testing, and sustainment of weapon systems to ensure system performance, reliability and mission readiness. Additional qualification information can be found from the following Office of Personnel Management website:All Professional Engineering Positions, 0800 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.