Today's IRS Organization

Our organizational structure closely resembles the private sector model of organizing around customers with similar needs.

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 — Charles P. Rettig
  • Chief of Staff — Lia Colbert
  • IRS Chief Counsel —  Michael J. Desmond
  • Taxpayer Advocate Service — Bridget Roberts*, National Taxpayer Advocate
  • Appeals — Donna Hansberry, Chief
  • Communications and Liaison — Terry Lemons, Chief  

*Denotes acting assignment

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 — Kirsten Wielobob
  • Wage and Investment Division — Ken Corbin, Commissioner
  • Large Business and International Division — Douglas O'Donnell, Commissioner
  • Small Business/Self Employed Division — Mary Beth Murphy, Commissioner
  • Tax Exempt and Government Entities Division — Sunita Lough, Commissioner
  • Criminal Investigation — Don Fort, Chief
  • Return Preparer Office — Carol Campbell, Director
  • Office of Professional Responsibility — Elizabeth Kastenberg*, Director 
  • Office of Online Services —  Jeffrey Wallbaum*, Director
  • Whistleblower Office — Lee Martin, Director

*Denotes acting assignment

The Deputy Commissioner reports directly to the Commissioner and oversees the integrated IRS support functions:

  • Deputy Commissioner for Operations Support — Jeff Tribiano
  • Chief Information Officer — Nancy Sieger*
  • Chief Facilities Management and Security Service — Richard Rodriguez
  • Chief Research and Analytics Officer — Barry Johnson*
  • Equity, Diversity and Inclusion — Elita Christiansen, Executive Director
  • Chief Human Capital Officer — Robin D. Bailey, Jr.
  • Chief Financial Officer — Ursula Gillis 
  • Chief Privacy Officer — Edward Killen
  • Chief Procurement Officer — Shanna Webbers
  • Chief Risk Officer — Thomas Brandt

*Denotes acting assignment

See the basic structure of today's IRS in this picture of the IRS Organization Chart (PDF).

Get an overview of the four primary operating divisions and the other principal offices in the IRS organization.