Career comparison
Nuclear Reactor Operator vs. Stationary Engineer
Side-by-side pay, training, growth and day-to-day duties to help you choose between two related careers.
Nuclear reactor operators earn more at the median ($122,890 vs. $78,620), while nuclear reactor operators usually get to work faster (2–4+ years of training). Nuclear reactor operators control nuclear reactors that generate carbon-free electricity. Stationary engineers run boilers, chillers and building systems that heat and cool large facilities.
Pay data: BLS OEWS, May 2025 · Outlook: BLS 2025–35 · Checked October 15, 2026
| Nuclear Reactor Operator | Stationary Engineer | |
|---|---|---|
| Median pay | $122,890 ($59.08/hr) | $78,620 ($37.80/hr) |
| Pay range (10th–90th) | $98,640 – $149,310 | $50,590 – $125,390 |
| Job growth, 2025–35 | -5.9% (a projected decline) | +3.1% (about as fast as average) |
| Openings per year | 400 | 3,200 |
| Typical entry education | High school diploma or equivalent | High school diploma or equivalent |
| Training time | 2–4+ years | 1–4 years |
| Key credential | NRC Reactor Operator (RO) license | State or city stationary engineer license |
| Work setting | Operators work in secure nuclear plant control rooms and plant areas with radiation controls and strict security.. | Stationary engineers work in mechanical rooms and central plants that can be hot and noisy, plus throughout buildings.. |
What each job does
Nuclear Reactor Operator
- Control reactor power and systems
- Monitor instruments and alarms
- Perform surveillance tests
- Respond to abnormal and emergency conditions
- Follow technical specifications
Stationary Engineer
- Operate boilers, chillers and pumps
- Monitor building automation systems
- Perform preventive maintenance
- Test and treat boiler water
- Troubleshoot and repair equipment
How they’re similar
Both careers involve shift work, high-pay, indoor work, and steady routines. Both are part of the energy & utilities field, so many skills transfer between them.
Which should you choose?
Choose nuclear reactor operator if…
- I want one of the highest-paying jobs without a degree
- I can handle intense training
- I follow procedures exactly
Choose stationary engineer if…
- I like mechanical systems
- I enjoy troubleshooting
- I want steady building work
Still torn? Take the Nuclear Reactor Operator fit quiz and the Stationary Engineer fit quiz, or the full Career Match Quiz.
Quick comparisons
Which pays more, nuclear reactor operator or stationary engineer?
Nuclear Reactor Operators earn more at the median: $122,890 versus $78,620 for stationary engineers, based on BLS May 2025 data.
Which takes less time to train for?
Nuclear Reactor Operators typically train faster (2–4+ years) than stationary engineers (1–4 years).
Which career has better job growth?
BLS projects stationary engineers to grow +3.1% from 2025–35, compared with -5.9% for nuclear reactor operators.