Specialized Experience: For the GS-15, you must have one year of experience at a level of difficulty and responsibility equivalent to the GS-14 in the Federal service. Experience for this position includes: Experience for this position includes: experience managing two or more major HR operational functions such as payroll and processing, benefits administration (health, life insurance, retirement, TSP), HR automated systems, compensation authorities (e.g., special pay systems, Title 13 or excepted service programs), field or decennial HR programs, or other high-volume, highly regulated HR operations; experience advising executives, managers, and employees on complex HR issues, and communicating HR initiatives, priorities, program performance, and emerging issues; interpreting and applying federal HR laws, regulations, OPM policies and agency directives to develop new or revise existing HR policies, procedures or long-range plans; and experience supervising subordinate supervisors or professional HR staff. 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.