Siim Kallas (born 2 October 1948 in Tallinn) is an Estonian politician currently serving as European Commissioner for Transport. He is also one of five vice-presidents of the 27-member Barroso Commission. He has been nominated as commissioner for Transport and vice-president in the second Barroso Commission.Kallas has been Prime Minister of Estonia Estonian Minister of Finance Estonian Minister of Foreign Affairs Member of the Supreme Council of the Soviet Unionand member of the Riigikogu. 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?
Office Holder