The U.S. Railroad Retirement Board's Office of Inspector General seeks a contractor to perform an annual, limited-scope actuarial audit of its financial statements, specifically the Statement of Social Insurance and Statement of Changes in Social Insurance Amounts. The base period covers the FY 2026 audit of the 2025 statement, with four optional one-year extensions available through the 2029 statement. The work involves verifying compliance with accounting standards, the reasonableness of estimates, and the reliability of data. The contractor must provide a draft report by mid-September and a final report by the first week of October, and must allow for an annual onsite quality review by the OIG in May/June. Services will be performed for the OIG, which is located in Chicago, IL.