Please answer the following question: Colonel Edward Thomas Bolitho OBE (born 30 December 1955) elder son of Major Simon Bolitho MC served as a Deputy Lieutenant of Cornwall from 2008 until his appointment in September 2011 as Lord-Lieutenant. He was also High Sheriff of the county from March 2011 to March 2012 an unusual combination of roles in modern times. 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