| Operate or maintain stationary engines, boilers, or other mechanical equipment to provide utilities for buildings or industrial processes. Operate equipment, such as steam engines, generators, motors, turbines, and steam boilers. | 
  | 
| Mean Wage History | 
| Year | This Occupation | Compared to Occupational Group | Difference | 
| Current | $28.07 |   | $19.17 | 
  | $8.90 | 
| 2015 | $27.18 | +3.3% | $18.56 | 
+3.3% | $8.62 | 
| 2014 | $26.56 | +2.3% | $18.14 | 
+2.3% | $8.42 | 
| 2013 | $26.06 | +1.9% | $17.80 | 
+1.9% | $8.26 | 
| 2012 | $25.63 | +1.7% | $17.50 | 
+1.7% | $8.13 | 
| 2011 | $25.22 | +1.6% | $17.22 | 
+1.6% | $8.00 | 
| 2010 | $24.94 | +1.1% | $17.03 | 
+1.1% | $7.91 | 
| 2009 | $24.51 | +1.8% | $16.74 | 
+1.8% | $7.77 | 
| 2008 | $23.87 | +2.7% | $16.30 | 
+2.7% | $7.57 | 
| 2007 | $23.32 | +2.3% | $15.93 | 
+2.3% | $7.39 | 
| Year | This Occupation | Compared to All Occupations | Difference | 
| Current | $28.07 |   | $23.35 | 
  | $4.72 | 
| 2015 | $27.18 | +3.3% | $22.70 | 
+2.9% | $4.48 | 
| 2014 | $26.56 | +2.3% | $22.21 | 
+2.2% | $4.35 | 
| 2013 | $26.06 | +1.9% | $21.76 | 
+2.1% | $4.30 | 
| 2012 | $25.63 | +1.7% | $21.39 | 
+1.7% | $4.24 | 
| 2011 | $25.22 | +1.6% | $21.05 | 
+1.6% | $4.16 | 
| 2010 | $24.94 | +1.1% | $20.70 | 
+1.7% | $4.24 | 
| 2009 | $24.51 | +1.8% | $20.42 | 
+1.4% | $4.09 | 
| 2008 | $23.87 | +2.7% | $19.90 | 
+2.6% | $3.97 | 
| 2007 | $23.32 | +2.3% | $19.26 | 
+3.3% | $4.06 | 
  | 
| Reference Date: 1st Quarter 2016 |