The second in command at the Department of Health and Human Services is leaving his post as part of a shake-up in personnel ahead of the midterm elections.

HHS Deputy Secretary and acting Director of the Centers for Disease Control and Prevention Jim O’Neill departed the administration, a source familiar with the situation told the Washington Examiner. He changed his bio on his X account to “formerly @hhsgov” as of Friday afternoon. O’Neill did not respond to the Washington Examiner’s request for comment.