John Watson Foster (March 2 1836 November 15 1917) was an American diplomat and military officer as well as lawyer and journalist. His highest public office was U.S. Secretary of State under Benjamin Harrison although he also proved influential as a lawyer in technically private practice in the international relations sphere. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Office Holder