- Service Unit Operators, Oil, Gas, and Mining
- Chemical Plant and System Operators Green
- Gas Plant Operators
- Petroleum Pump System Operators, Refinery Operators, and Gaugers
- Chemical Equipment Operators and Tenders
- Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders
- Mixing and Blending Machine Setters, Operators, and Tenders
- Cooling and Freezing Equipment Operators and Tenders
- Gas Compressor and Gas Pumping Station Operators
- Tank Car, Truck, and Ship Loaders