The industrial commission shall obtain such assistance as in its judgment may be necessary for the establishment, maintenance, and operation of the association. To that end it shall appoint a manager and may appoint such subordinate officers and employees as it may judge expedient. It may constitute such manager its general agent, in respect to the functions of the association, but subject, nevertheless, in such agency, to the supervision, limitation, and control of the commission. It shall employ such contractors, architects, builders, attorneys, clerks, accountants, and other experts, agents, and servants as in the judgment of the commission the interests of the state may require, and shall define the duties, designate the titles, and fix the compensation and bonds of all such persons so engaged.