71 Pa. Stat. § 1467
The commissioner, with the approval of the Governor, shall appoint a chief of each bureau. The chiefs of bureaus shall each receive an annual salary of not more than five thousand dollars ($5,000), except the chief of the bureau of mental health, who shall receive a salary of not more than seventy-five hundred dollars ($7,500), and have charge of their respective bureaus, subject to the direction, control, and supervision of the commissioner, and shall perform such duties as he may prescribe.
The commissioner may appoint such other officers, inspectors, agents, and employés, as the work of the department may require, who shall receive such salary or compensation as the commission may determine. The commissioner may also employ persons having professional or expert knowledge of the matters within the jurisdiction or supervision of the department.
71 P.S. § 1467