Radiologic Technologists and Technicians
Rail Yard Engineers, Dinkey Operators, and Hostlers
Rail-Track Laying & Maintenance Equipment Operators
Refractory Materials Repairers, Except Brickmasons
Registered Nurses
Reinforcing Iron and Rebar Workers
Respiratory Therapists
Rock Splitters, Quarry
Roof Bolters, Mining
Roofers
Rotary Drill Operators, Oil & Gas
Roustabouts, Oil & Gas