- Oil Pit Attendant
- Oiler
- Oiler Bander
- Operations and Maintenance Manager
- Operations and Maintenance Tech
- Operations and Maintenance Technician
- Ops and Maintenance Manager
- Air Deodorizer Servicer
- Alemite Op
- Alemite Operator
- Boiling House Oiler
- Booster Pump Oiler
- Breaker Oiler
- Car Oiler
- Crane Oiler
- Dragline Oiler
- Engine Oiler
- Equipment Oiler
- Equipment Cleaner and Tester
- Loading Shovel Oiler
- Locomotive Oiler
- Machine Oiler
- Mill Oiler
- Nozzle and Sleeve Worker
- Pump Oiler
- Rubber and Plastics Worker
- Shovel Oiler
- Steam Shovel Oiler
- Stripping Shovel Oiler
- Stroboscope Op
- Stroboscope Operator
- Tipple Oiler
- Tubing Oiler
- Turbo Generator Oiler
- Replace, empty, or replenish machine and equipment containers such as gas tanks or boxes.
- Set up and operate machines, and adjust controls to regulate operations.
- Start machines and observe mechanical operation to determine efficiency and to detect problems.
- Operate cranes, hoists, or other moving or lifting equipment.
- Observe equipment in operation to detect potential problems.
