He was the first, there's been another.
https://www.thegatewaypundit.com/2025/04/breaking-secretary-pete-hegseth-removes-deputy-chief-staff/
The Gateway Pundit · BREAKING: Secretary Pete Hegseth Removes Deputy Chief of Staff Darin Selnick Following Internal Leak Investigation | The Gateway Pundit | by Jim HᴏftIn a significant move, Secretary Pete Hegseth has placed Deputy Chief of Staff Darin Selnick on leave amid a probe into sensitive military information leaks, highlighting growing concerns within the Pentagon.