Protective Service Occupations First-Line Supervisors of Correctional Officers First-Line Supervisors of Police and Detectives First-Line Supervisors of Fire Fighting and Prevention Workers First-Line Supervisors of Protective Service Workers, All Other Firefighters Fire Inspectors and Investigators Forest Fire Inspectors and Prevention Specialists Bailiffs Correctional Officers and Jailers Detectives and Criminal Investigators Fish and Game Wardens Parking Enforcement Workers Police and Sheriff's Patrol Officers Transit and Railroad Police Animal Control Workers Private Detectives and Investigators Gaming Surveillance Officers and Gaming Investigators Security Guards Crossing Guards Lifeguards, Ski Patrol, and Other Recreational Protective Service Workers Transportation Security Screeners* (federal only) Protective Service Workers, All Other *