Like any other organization, the IRS works hard to further provide better services to taxpayers. With the enactment of the IRS Restructuring and Reform Act of 1998, for the first time in 50 years, the Service reorganizes itself to resemble private sector models of organizing around customers with similar needs. The IRS now has three commissioner-level organizations to support its structure and improve accountability:
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
• Chief of Staff — Jonathan M. Davis
• IRS Chief Counsel — William J. Wilkins
• Appeals — Diane Ryan, Chief
• Taxpayer Advocate Service — Nina E. Olson, National Taxpayer Advocate
• Equity, Diversity and Inclusion — Debra Chew, Executive Director
• Research, Analysis and Statistics — Rosemary Marcuss, 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 — Steven T. Miller
• Wage and Investment Division — Richard E. Byrd, Jr., Commissioner
• Large and Mid-Size Business Division — Heather Maloy, Commissioner
• Small Business/Self Employed Division — Christopher Wagner, Commissioner
• Tax Exempt and Government Entities Division — Sarah Hall Ingram, Commissioner
• Criminal Investigation — Victor Song, Chief
• Office of Professional Responsibility — Karen L. Hawkins, 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 — Mark Ernst
• Chief Technology Officer — Terence V. Milholland
• Agency-Wide Shared Services — Dave Grant, Chief
• Human Capital Officer — James P. Falcone, Chief
• Chief Financial Officer — Greg Kane (Acting) Chief
• Office of Privacy, Information Protection and Data Security — Hun Kim (Acting) Director

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