Heating & Boiler Plant Equipment Mechanic federal salary series 5309
Full-time federal employees in the Heating & Boiler Plant Equipment Mechanic series earned a median of $83,522 in annualized adjusted basic pay in September 2026, 24% below the all-federal median of $109,641. The middle half earned between $67,092 and $85,776.
What shapes heating & boiler plant equipment mechanic pay
The most common grade with published pay is WG-10 (189 employees, median $79,515). Federal pay depends mostly on grade and step, plus a locality adjustment for where the job is located; see the GS pay scale explainer.
OPM withheld pay for 85% of employees in this series. The figures here describe only employees with published pay; withholding is concentrated in certain agencies (see data coverage).
Heating & Boiler Plant Equipment Mechanic pay by grade
Grades with at least 30 full-time employees with published pay. GS grades are listed first; other pay plans follow.
| Pay plan–grade | Employees | Median pay |
|---|---|---|
| WG-10 | 189 | $79,515 |
middle 50% (25th–75th percentile) 10th–90th percentile median all-federal median ($109,641)
Change since September 2025
The median moved +12.5% from $74,214 in September 2025 to $83,522 in September 2026. Headcount went from 251 to 228 (−9.2%). A change in the median reflects both pay adjustments and who joined or left the workforce, so it is not the same as a pay raise.