Army Secretary Dan Driscoll submitted his resignation to President Trump on Monday, administration officials said, following months of reported tension with Defense Secretary Pete Hegseth over the removal of senior Army officers.

Driscoll, who has served as the service’s top civilian leader since February 2025, met with Trump in person to discuss the state of the Army before handing in his resignation, according to officials familiar with the matter. The move had been anticipated in recent weeks.

The White House praised Driscoll’s tenure in a statement, noting that he had been “highly effective in advancing President Trump’s agenda to Make America Strong Again” through leadership in military operations, emphasis on readiness and lethality, and assistance with Russia-Ukraine negotiations. The Army is “more powerful than ever thanks to his work,” the statement added.

Tensions between Driscoll and Hegseth reportedly centered on Hegseth’s decisions to fire or force out multiple senior officers, including Army Chief of Staff Gen. Randy George in April without public explanation. Driscoll had worked closely with George, and the friction extended to other personnel matters, including blocked promotions and the ouster of additional generals viewed as key to Army transformation efforts.

The Army currently lacks a confirmed chief of staff, with Gen. Christopher LaNeve serving in an acting capacity. Driscoll’s exit leaves the service without a Senate-confirmed civilian secretary as well, at least until a successor is nominated and confirmed. The midterms approaching could complicate swift replacement.

Driscoll, 41, is the youngest person to hold the position and is a former Army Ranger and Iraq War veteran who later worked in finance and venture capital. He is also a longtime friend of Vice President JD Vance. Reports indicate he had considered departing as soon as Labor Day and had already relocated his family from the official residence.

The resignation comes as the Army plays a central role in U.S. military operations amid conflicts involving Iran in the Middle East and broader global demands. Multiple outlets first reported the development on Monday.