The Department of Natural Resources (DNR), Maryland Park Service is currently accepting applications for Administrative Specialist III positions at Freedmanâs State Park in Brookeville, Maryland (Montgomery County), and Gunpowder Falls State Park in Kingsville, Maryland (Baltimore County). Two years of experience using the following office hardware/equipment: printers, scanners, personal computer, external hard drives, copier, I-Pad or similar device, Smart Phone, digital phone system, cash register.