Almost three-quarters of railroad employees are members of a union, such as the International Association of Sheet Metal, Air, Rail and Transportation Workers (SMART) and the Brotherhood of Locomotive Engineers and Trainmen. The Association of American Railroads and the American Short Line & Regional Railroad Association are membership organizations for railroads. The Federal Railroad Administration is an agency of the U.S. Department of Transportation that regulates more than 760 railroads. The National Academy of Railroad Sciences offers training for railroad professionals.
- Air Traffic Controllers
- Airplane Dispatchers
- Airport Security Personnel
- Airport Service Workers
- App Services Workers
- Armored Truck Drivers
- Autonomous Vehicle Safety and Test Drivers
- Aviation Safety Inspectors
- Avionics Engineers
- Avionics Technicians
- Baggage Porters and Bellhops
- Civil Engineers
- Diesel Mechanics
- Driverless Car Engineers
- Fleet Maintenance Technicians
- Flight Attendants
- Flight Instructors
- Green Transportation Careers
- Hypersonics Engineers
- Hypersonics Technicians
- Locomotive Engineers
- Mechanical Engineering Technicians
- Mechanical Engineers
- Non-Destructive Testing Specialists
- Pilots
- Public Transportation Operators
- Reservation and Ticket Agents
- Ship's Captains
- Signal Mechanics
- Space Pilots
- Stevedores
- Taxi Drivers
- Toll Collectors
- Traffic Engineers
- Transportation Engineers
- Transportation Planners
- Truck Dispatchers
- Truck Drivers