Applicants must have documented prior primary firefighting experience, with substantial service defined as either: - At least one full fire season working in a primary wildland firefighting role (e.g., Engine Crew, Fire Effects Crew, Prescribed Fire/Fuels Crew, Hand Crew, Helitack Crew, Hotshot Crew, Smokejumper, Wildland Fire Modules or Fire Suppression Crews, etc.) with a federal, state, tribal, local, or private-sector organization; - OR -. Required documentation includes: First and last SF-50 (Notification of Personnel Action) for each appointment verifying the Position Occupied code (block 34, code 1-Competitive Service), AND Documentation of satisfactory performance for each appointment, such as, performance evaluations, memorandum of record, whereas the supervisor(s) documented an acceptable performance level for a specified rating/employment period.