The IRS Restructuring and Reform Act of 1998 prompted the most comprehensive reorganization and modernization of IRS in nearly half a century. The IRS reorganized itself to closely resemble the private sector model of organizing around customers with similar needs.
To support its structure and ensure accountability, the IRS is divided into three commissioner-level organizations:
Commissioner
Specialized IRS units report directly to the Commissioner’s office. The IRS Chief Counsel also reports to the Treasury General Counsel on certain matters.
- Commissioner, Internal Revenue — Douglas Shulman
- IRS Chief Counsel — Donald L. Korb
- Appeals — Sarah Hall Ingram, Chief
- Taxpayer Advocate Service — Nina E. Olson, National Taxpayer Advocate
- Equal Employment Opportunity and Diversity — Dora Trevino, Acting Chief
- Research, Analysis and Statistics — Mark Mazur, Director
- Communications and Liaison — Frank Keith, Chief
Deputy Commissioner for Services and Enforcement
The Deputy Commissioner reports directly to the Commissioner and oversees the four primary operating divisions and other service and enforcement functions:
- Deputy Commissioner for Services and Enforcement — Linda E. Stiff
- Wage and Investment Division — Richard E. Byrd, Jr., Commissioner
- Large and Mid-Size Business Division — Frank Y. Ng, Commissioner
- Small Business/Self Employed Division — Kathy Petronchak, Commissioner
- Tax Exempt and Government Entities Division — Steven T. Miller, Commissioner
- Criminal Investigation — Eileen C. Mayer, Chief
- Office of Professional Responsibility — Michael Chesman, Director
- Whistleblower Office — Stephen A. Whitlock, Director
Deputy Commissioner for Operations Support
The Deputy Commissioner reports directly to the Commissioner and oversees the integrated IRS support functions, facilitating economy of scale efficiencies and better business practices:
- Deputy Commissioner for Operations Support — Richard A. Spires
- Modernization and Information Technology Services — Art Gonzales, Chief Information Officer
- Agency-Wide Shared Services — James P. Falcone, Chief
- Human Capital Officer — Robert Buggs, Chief
- Chief Financial Officer — Alison Doone, Chief
- Office of Privacy, Information Protection and Data Security — Deborah Gascard Wolf, Director
Organization Chart
See the basic structure of today's IRS in this picture of the IRS Organization Chart (PDF 148KB).
At-a-Glance: IRS Divisions and Principal Offices
Get an overview of the four primary operating divisions and the other principal offices in the IRS organization.
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