Dana W. White, Defense Secretary Jim Mattis’ public affairs chief abruptly announced her resignation on Twitter on New Year's Eve.
the spokeswoman was investigated by the department’s inspector general after allegations that she misused her authority and used her staff for personal business.
The tweet from Dana W. White came hours after outgoing Defense Secretary James Mattis sent his farewell message to department employees.
"I appreciate the opportunity afforded to me by this administration to serve alongside Secretary Mattis, our Service members and all the civilians who support them. It has been my honor and privilege," White tweeted on Monday.
White became the Pentagon's chief spokeswoman in April 2017 and reported directly to Mattis.
Charles Summers Jr., a principal deputy assistant to the Secretary of Defense, will take over her duties on Tuesday.