Driscoll submitted his resignation to Trump on Monday, and the president accepted it, according to U.S. officials. The White House praised Driscoll's tenure, citing his work on military readiness, modernization and the administration's defense agenda. Driscoll, an Iraq War veteran and former investment executive, was confirmed by the Senate in February 2025 and became the Army's top civilian official later that month.

The resignation follows months of reported friction between Driscoll and Hegseth over Army modernization efforts and personnel decisions, including changes involving senior military commanders. Driscoll had promoted efforts to expand the Army's use of drones and commercial technology while seeking to streamline defense procurement. His departure comes as the U.S. military remains heavily engaged in the conflict with Iran and amid broader changes to the Pentagon's senior leadership.