As of 2021 there were 14,180 people employed as Furnace, Kiln, Oven, Drier, and Kettle Operators and Tenders within the United States.
This represents around 0.010% of the employed workforce across the country.
Put another way, around 1 in 9 thousand people are employed as Furnace, Kiln, Oven, Drier, and Kettle Operators and Tenders.