To qualify for the ZT-III, applicants must have one year (52 Weeks) of specialized experience equivalent to a GS-08 grade level (ZTII for NIST employees) in the Federal service. Specialized experience is defined as: Experience assisting or providing technical support with regular routine procedures, operations, or maintenance of a nuclear facility. OR Two full years of graduate education OR A master's degree related to the position OR A combination of education and experience To qualify for the ZT-IV, applicants must have one year (52 Weeks) of specialized experience equivalent to a GS-10 grade level (ZT-III for NIST employees) in the Federal service. Specialized experience is defined as: Experience performing routine operations or equipment maintenance on a nuclear facility with little supervision And Experience identifying abnormal conditions and performing complex or specialized maintenance activities 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. The qualification requirements in this vacancy announcement are based on the U.S. Office of Personnel Management (OPM) Qualification Standards Handbook. If requesting reconsideration of your qualification determination, please refer to the following site: Applicant Reconsideration