text: On July 29 , 2005 , Bush appointed Geren the acting United States Secretary of the Air Force , a position he served in until the confirmation of his successor Michael Wynne in November 2005 .
simplified: He had already been acting United States Secretary of the Air Force , between 29 July 2005 and position he served in until the confirmation of his successor Michael Wynne on 4 November 2005 .