- Aircraft Maintenance & Overhaul
- Aluminum & Other Metal Smelting
- Electronics Manufacturers (Clean Room Maintenance)
- Hospitals & Clinics Magnetic Resonance Imaging (MRI- Maintenance on or near)
- Mine Sweepers
- Nuclear Products & Testing Machines
- Precision Magnetic Equipment (Compasses & Electronics – Maintenance on or near)
- Public Utilities: Gas, Electric & Telecommunication
- Radar Transmission Centers