93b44d90__S__Bureau_of_Labor_Statistics__Job_Duties
[Occupation] Stationary Engineers and Boiler Operators [ENTRY-LEVEL EDUCATION] High school diploma or equivalent [2012 MEDIAN PAY] $53,560 [Job Duties] 
Stationary engineers and boiler operators control stationary engines, boilers, or other mechanical equipment to provide utilities for buildings or for industrial purposes.
Food and Tobacco Processing Workers : Occupational Outlook Handbook: : U.S. Bureau of Labor Statistics