Q:Dan Tangherlini -  Daniel M. Dan Tangherlini is the Administrator of the United States General Services Administration. Unanimously approved to the post by the United States Senate on June 27 2013 he had served as Acting Administrator since his appointment by President Barack Obama on April 2 2012. He earlier served as an executive in the U.S. Department of Treasury as City Administrator of Washington D.C. and as interim General Manager for the Washington Metropolitan Area Transit Authority. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Office Holder