The median annual wage for Stationary Engineers and Boiler Operators in St. Louis, MO-IL is $75,020 (May 2024 BLS OES). The mean (average) is $75,540.
Pay spans roughly $54,040 at the 10th percentile to $93,690 at the 90th, so experience and specialisation move this figure a lot. At the median that is about $36.07 per hour. An estimated 240 people work as stationary engineers and boiler operators in St. Louis, MO-IL.
| Median (annual) | $75,020 |
| Mean (annual) | $75,540 |
| Median (hourly) | $36.07 |
| 10th percentile | $54,040 |
| 90th percentile | $93,690 |
| Employment | 240 |
Updated 2026-07-23.
Source: BLS OES May 2024 — bls.gov/oes. Checked 2026-07-23.