Stationary Engineers and Boiler Operators
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.
Most important skills
- Operations Monitoring
- Operation and Control
- Active Listening
- Critical Thinking
- Equipment Maintenance
- Troubleshooting
- Repairing
- Reading Comprehension
Key knowledge
- Mechanical
- Chemistry
- Public Safety and Security
- Physics
- Engineering and Technology
- English Language
- Computers and Electronics
- Mathematics
What the work involves
- Operate or tend stationary engines, boilers, and auxiliary equipment, such as pumps, compressors, or air-conditioning equipment, to supply and maintain steam or heat for buildings, marine vessels, or pneumatic tools.
- Observe and interpret readings on gauges, meters, and charts registering various aspects of boiler operation to ensure that boilers are operating properly.
- Test boiler water quality or arrange for testing and take necessary corrective action, such as adding chemicals to prevent corrosion and harmful deposits.
- Activate valves to maintain required amounts of water in boilers, to adjust supplies of combustion air, and to control the flow of fuel into burners.
- Monitor boiler water, chemical, and fuel levels, and make adjustments to maintain required levels.
- Monitor and inspect equipment, computer terminals, switches, valves, gauges, alarms, safety devices, and meters to detect leaks or malfunctions and to ensure that equipment is operating efficiently and safely.
- Analyze problems and take appropriate action to ensure continuous and reliable operation of equipment and systems.
- Maintain daily logs of operation, maintenance, and safety activities, including test results, instrument readings, and details of equipment malfunctions and maintenance work.
Strongest interest areas (O*NET): Realistic, Conventional, Investigative.
Qualifications and licensing
- Most common education
- Post-Secondary Certificate (47.2% of respondents)
- Related experience
- Over 1 year, up to and including 2 years (24%)
- On-the-job training
- Over 6 months, up to and including 1 year (40.9%)
- Preparation level
- O*NET job zone 3: Job Zone Three: Medium Preparation Needed
- Licensing
- Not yet verified. Check your state licensing board.
Check before planning
- Licensing for Stationary Engineers and Boiler Operators is not yet verified for any state: check the state licensing board before planning.
Limits
- Distributions show what current workers or occupational experts report, not legal minimums.
- Requirements vary by employer and state; time to qualify is not estimated.
Source: O*NET 31.0 Database (USDOL/ETA, CC BY 4.0); BLS Employment Projections · dataset 2026.10.8 · method e3-qualification-1.0.0
Work environment
How the typical conditions of this occupation compare with 911 occupations in O*NET (very low = the lowest fifth).
Levels are relative. Most occupations involve a lot of contact with people, for example, so “very low” can still mean regular contact; the last column shows what workers actually reported.
| Condition | Level | Compared with other occupations | Most common answer (O*NET survey) |
|---|---|---|---|
| Contact with others | High | Higher on contact with others than 79% of occupations compared | 75% of surveyed respondents chose “Constant contact with others” |
| Dealing with the public | Moderate | Lower on dealing with the public than 52% of occupations compared | 37% of surveyed respondents chose “Extremely important” |
| Teamwork | Very high | Higher on teamwork than 86% of occupations compared | 68% of surveyed respondents chose “Extremely important” |
| Freedom to make decisions | Moderate | Higher on freedom to make decisions than 58% of occupations compared | 47% of surveyed respondents chose “Some freedom” |
| Time pressure | Low | Lower on time pressure than 60% of occupations compared | 35% of surveyed respondents chose “Once a week or more but not every day” |
| Conflict situations | High | Higher on conflict situations than 77% of occupations compared | 32% of surveyed respondents chose “Once a week or more but not every day” |
| Dealing with unpleasant or angry people | High | Higher on dealing with unpleasant or angry people than 74% of occupations compared | 29% of surveyed respondents chose “Every day” |
| Consequence of error | Very high | Higher on consequence of error than 90% of occupations compared | 40% of surveyed respondents chose “Extremely serious” |
Work-pressure profile
- Time pressure: low
- Conflict situations: high
- Dealing with unpleasant or angry people: high
- Consequence of error: very high
Each part is shown on its own. There is no combined stress score, and conditions vary by employer and role.
Full answer distributions
Contact with others
- No contact with others: 0%
- Occasional contact with others: 0%
- Contact with others about half the time: 1.75%
- Contact with others most of the time: 23.72%
- Constant contact with others: 74.52%
n = 21, Incumbent 08/2023
Dealing with the public
- Not important at all: 16.33%
- Fairly important: 15%
- Important: 22.94%
- Very important: 8.28%
- Extremely important: 37.45%
n = 21, Incumbent 08/2023
Teamwork
- Not important at all: 0.19%
- Fairly important: 0%
- Important: 0.88%
- Very important: 30.45%
- Extremely important: 68.48%
n = 21, Incumbent 08/2023
Freedom to make decisions
- No freedom: 4.45%
- Very little freedom: 0%
- Limited freedom: 7.17%
- Some freedom: 46.72%
- A lot of freedom: 41.66%
n = 21, Incumbent 08/2023
Time pressure
- Never: 4.26%
- Once a year or more but not every month: 9.11%
- Once a month or more but not every week: 23.27%
- Once a week or more but not every day: 35.36%
- Every day: 28%
n = 21, Incumbent 08/2023
Conflict situations
- Never: 7.82%
- Once a year or more but not every month: 19.79%
- Once a month or more but not every week: 25.61%
- Once a week or more but not every day: 31.74%
- Every day: 15.05%
n = 21, Incumbent 08/2023
Dealing with unpleasant or angry people
- Never: 13.08%
- Once a year or more but not every month: 23.82%
- Once a month or more but not every week: 14.33%
- Once a week or more but not every day: 19.89%
- Every day: 28.88%
n = 21, Incumbent 08/2023
Consequence of error
- Not serious at all: 1.15%
- Fairly serious: 1.53%
- Serious: 26.41%
- Very serious: 30.82%
- Extremely serious: 40.1%
n = 21, Incumbent 08/2023
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O*NET-SOC 51-8021.00 · SOC 51-8021 (exact, high confidence) · dataset 2026.10.8