For GS-09: Your resume must demonstrate at least one year of specialized experience at or equivalent to the GS-7 grade level or pay band in the Federal service or equivalent experience in the private or public sector. Specialized experience must demonstrate the following: 1) Reviewing technical data on environmental activities and to develop recommendations for a course of action; 2) Evaluating work practices to determine compliance with environmental protection laws and regulations; and 3) Recommending changes to control or eliminate potential or existing environmental hazards or violations. For GS-11: Your resume must demonstrate at least one year of specialized experience at or equivalent to the GS-09 grade level or pay band in the Federal service or equivalent experience in the private or public sector. Specialized experience must demonstrate the following: 1) Solving problems using established policies; 2) Planning, implementing, or monitoring environmental programs and services that are compliant with Federal, state, and local requirements in regards to hazardous waste disposal, air compliance, water compliance, containment, or usage; and 3) Researching environmental issues to implement appropriate changes. 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/0000/environmental-protection-specialist-series-0028/ 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.