The Department of Finance and Administration shall prescribe rules and regulations governing the manner in which the authority and duties granted to it by law may be carried out. It shall employ suitable and competent personnel, necessary to carry out its purposes. The Department of Finance and Administration may establish an Office of Purchasing, Travel and Fleet Management and employ a competent person as Director of the Office of Purchasing, Travel and Fleet Management who shall be nonstate service and paid a salary as determined by the Executive Director of the Department of Finance and Administration with the approval of the State Personnel Board.