The commissioners shall employ an executive director. The executive director shall be the secretary of the authority and shall administer, manage, and direct the affairs and business of the authority, subject to the policies, control, and direction of the commissioners. The commissioners may employ technical experts and such other officers, agents, and employees as they deem necessary, and may fix their qualifications, duties, and compensation. The executive director and all other employees of the authority shall be state employees and eligible for all corresponding benefits. The commissioners may delegate to the executive director, or to one or more of its agents or employees, such powers and duties as it may deem proper.