According to Reuters, he will take a high-ranking position in the field of communications.
Pentagon spokesman John Kirby will move to the White House for a senior communications position, two informed sources told Reuters.
The Pentagon declined to comment.
Kirby, who was the face of Pentagon briefings, including after the Russian invasion of Ukraine, previously worked at the Department of State and was Pentagon press secretary under Defense Secretary Chuck Hagel.
Earlier, the Washington Post reported about his transition to the White House.