[fruser1]

Commissioner, not CEO.

[DFG]

“The IRS is led by the Commissioner and Chief Executive Officer who oversee the organization’s operating divisions and integrated support functions.”

https://www.irs.gov/about-irs/irs-organization

From AI:

“The IRS has a CEO because the Treasury Department administratively created the position to manage the agency’s day-to-day operations and bypass the lengthy Senate confirmation process required for a traditional Commissioner.

The primary reasons and context for this structure include:
Executive Appointment: The CEO title was created to install leadership quickly after the agency cycled through multiple acting commissioners and faced high turnover.

Dual Leadership: Treasury Secretary Scott Bessent (who also serves as the Acting IRS Commissioner) appointed Frank Bisignano—who also serves as the Commissioner of the Social Security Administration—to run day-to-day IRS operations.

Private-Sector Focus: Officials stated the role was designed to bring private-sector management efficiency, better customer service, and modernization to the agency’s complex bureaucracy.”