Sharyn Fisk served as Director of the IRS Office of Professional Responsibility from 2020 to 2025, where she was responsible for the agency’s oversight of the tax professionals who practice before the IRS under Treasury Circular 230, setting and maintaining professional standards for more than 400,000 practitioners nationwide. During her tenure she oversaw notable revisions to Circular 230, and she also led the Tax Provision Implementation Office, directing implementation of 34 tax provisions of the Inflation Reduction Act and the CHIPS Act. She brings more than 20 years of experience in tax law and currently serves as Professor of Taxation at the College of Business Administration at Cal Poly Pomona.