All qualification requirements must be met by the closing date of the announcement. Minimum Qualifications: For GS-7: To qualify at the GS-7 grade level, you must have at least one year of specialized experience at or equivalent to the GS-6 grade level, which must include the following experience: applying technical engineering methods, techniques in a laboratory and/or field setting by assembling, installing, adjusting, calibrating, modifying and maintaining scientific and field equipment. OR Experience in a trade or craft may be credited as specialized experience when the work provided intensive knowledge of engineering principles, techniques, methods, and precedents. Examples are trade positions with substantial developmental, test, or design responsibilities such as: Planner and estimator who analyzed designs for production purposes. Instrument maker or model maker who performed design or development work on devices fabricated. For GS-8: To qualify at the GS-8 grade level, you must have at least one year of specialized experience at or equivalent to the GS-7 grade level, which must include the following experience: applying technical engineering methods to install, adjust, calibrate, modify and maintain scientific and field equipment for the purpose of resolving problems, improving equipment efficiency and reliability of results. OR One and a half years of graduate education in a field directly related to the work of the position. Experience refers to paid and unpaid experience, including volunteer work done through National Service programs (e.g., Peace Corps, AmeriCorps) and other organizations (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. You will receive credit for all qualifying experience, including volunteer experience. Promotion potential: Promotion to the next grade level is at management’s discretion and is based on your meeting qualifications and time-in-grade requirements, demonstrated ability to perform the higher-level duties, the continuing need for the higher-level duties, and administrative approval. Promotion to the next grade level is not guaranteed and no promise of promotion is implied.