A tax attorney,  Fisk has most recently been a professor of tax at the College of Business Administration at Cal Poly Pomona. She has represented thousands of all tax practitioners, tax preparers and other third parties before the IRS. Subject include civil examinations and appeals, criminal investigations and tax collection issues.

She was a principal with Hochman, Salkin, Rettig, Toscher & Perez of Beverly Hills, Calif., from 2000 through 2014 and was a tax attorney with the United States Tax Court.

OPR oversees all tax practitioners, tax preparers and other third parties in the tax system who practice before the IRS to ensure they adhere to professional standards and follow the law. The office works to increase education, awareness and understanding of Circular 230 and investigates and enforces cases related to Circular 230.