The head of the Postal Service’s regulatory agency is stepping down, after challenging some of the more controversial parts of a 10-year USPS reform plan.

Michael Kubayanda, chairman of the Postal Regulatory Commission, is leaving the agency, after serving for more than six years.

Kubayanda’s term lasts through November 2026, but he told Federal News Network that he’s stepping down from the agency “completely on my own accord.”

Kubayanda led the regulatory agency at a time when its role was repeatedly questioned by the officials it was tasked with overseeing. He said the regulatory agency improved its data analytics capabilities during his tenure, and put “sensible pressure on the Postal Service to do a better job” through its advisory opinions. He noted that the commission has been addressing the concerns of policymakers and citizens about service in rural areas in particular.