The following positions set forth in this section shall be exempt from Chapter 59 of this title:
(1) Secretary of Natural Resources and Environmental Control;
(2) Director of Fish and Wildlife;
(3) Director of Parks and Recreation;
(4) Director of Watershed Stewardship;
(5) Director of Air Quality;
(6) Director of Waste and Hazardous Substances;
(7) Director of Water;
(8) [Repealed.]
(9) Director of Energy and Climate.