Martin Leslie James Hamilton-Smith (born 1 December 1953) is the member for the electoral district of Waite in the South Australian House of Assembly since October 1997. He was a minister and Member of Executive Council in the Kerin Liberal government 2001 to 2002. He was the parliamentary leader of the South Australian division of the Liberal Party of Australia and the Leader of the Opposition in South Australia from 2007 to 2009. 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?
The answer to this question is:
Office Holder