The Commissioner of Revenue of the Department of Revenue shall appoint a director of the division, and may appoint or employ such agents, inspectors, clerks and other employees for such division as may be necessary to carry out the provisions of this chapter or to perform the duties and exercise the powers conferred by this chapter upon the department. The Commissioner of Revenue shall have the authority to employ, compensate, terminate, suspend with or without pay, promote, demote, transfer or reprimand the director, agents, inspectors, clerks and other employees of the division. The director and all permanent employees of the division shall devote their full time to the duties of their respective offices.