- Sheet Metal Workers
- Highway Maintenance Workers
- Stationary Engineers and Boiler Operators
- Chemical Plant and System Operators
- Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders Green
- Crushing, Grinding, and Polishing Machine Setters, Operators, and Tenders
- Mixing and Blending Machine Setters, Operators, and Tenders
- Sailors and Marine Oilers
- Gas Compressor and Gas Pumping Station Operators
- Pump Operators, Except Wellhead Pumpers