A professional who tends retort or vacuum chamber that fumigates or sterilizes used mattresses. Respnsibilities include:

• Loads mattresses on dollies and pushes them into chamber.
• Closes and bolts chamber door.
• Starts vacuum pump to remove air from chamber.
• Opens valves to control flow of fumigating or sterilizing gases into chamber, observing gauges and scale readings.
• Pumps gases from chamber and replaces gases with fresh air.
• Opens chamber door and removes loaded dollies.
• May tend fumigating device, used inside chamber, that produces fumes from heated chemicals.
• May tend oven to sterilize mattresses with hot air.