O.C.G.A. § 50-8-90

A commission may prescribe the compensation, benefits, and all terms and conditions of employment of its officers, employees, and agents. Acommission may contract with private individuals or firms for professional services deemed necessary to carry out its responsibilities under this article. Officers and employees of a commission shall be public employees. Comparability with existing wage classifications, pay plans, and other benefits of political subdivisions in its area shall be considered by a commission when carrying out this Code section.