Former Pentagon press secretary John Ullyot listens as Defense Secretary Pete Hegseth answers a reporter's question while meeting with UK Defense Secretary John Healey at the Pentagon on March 6, 2025. (Win McNamee/Getty Images)
The Department of Defense did not immediately respond Thursday to a request for comment from Fox News Digital.
During the first Trump administration, Ullyot served as the spokesperson for the National Security Council and was an assistant secretary for public and intergovernmental affairs at the Department of Veterans Affairs.
The Marine Corps veteran also served as a senior adviser in President Donald Trump’s 2016 election campaign.
TOP HEGSETH ADVISOR DAN CALDWELL PLACED ON ADMINISTRATIVE LEAVE
John Ullyot ran the Pentagon's press operation at the beginning of the second Trump administration, according to Politico, until Sean Parnell took over his position in February. (Daniel Slim/AFP via Getty Images)
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The probe was announced last month and concerned itself over "recent unauthorized disclosures of national security information."
Fox News’ Andrea Margolis and Jennifer Griffin contributed to this report.
Greg Norman is a reporter at Fox News Digital.
https://www.foxnews.com/politics/top-pentagon-official-john-ullyot-resign-end-of-week-report-