- National Park Service (Washington, DC)
- …State driver 's license. You must possess and maintain a valid Commercial Driver 's License ( CDL ) w/Tractor trailer, tanker, and air brakes endorsements. You ... to be hauled. Operate grader, loader, dozer and dump truck to remove snow from roads and parking lots...certifying to your possession of a valid State issued driver 's license that is current and has not been… more