MNMachinist's Mate Nuclear
MN
Career

Machinist's Mate Nuclear

By the numbers
Typical pay
$122,890 / yr
Education to start
High school diploma or equivalent
Future demand
-15.3% by 2034
People in this job
5K
Figures shown for ·closest of 3 O*NET occupations
The work
A day, hour by hour

Watch rotations run 24/7 — this is one sailor's day on the day-shift cycle at sea.

05:45
Watch Relief

Receive full system status brief from outgoing watch; nothing gets missed.

06:00
Reactor Watch

Stand four hours at the panel — scan every gauge, log every reading.

07:30
Anomaly Call

Coolant pressure ticks odd — real problem or bad sensor? Decide fast.

10:00
Maintenance Work

Pull a coolant pump, replace seals, torque every fitting to spec.

12:30
Rad Survey

Sweep the reactor spaces with a dosimeter; confirm no unsafe exposure.

14:00
Procedure Drill

Walk a junior sailor through emergency shutdown steps — no shortcuts allowed.

16:00
Log & Records

Document every repair, reading, and system change from the full shift.

17:45
Watch Handoff

Brief the oncoming watch completely; they own it the moment you sign off.

Things you do
  • Monitor a live nuclear reactor and keep it running safely at sea.
  • Stand four-hour watches in the engine room around the clock.
  • Repair pumps, valves, and pipes that keep the reactor coolant flowing.
  • Run radiation checks and make sure no one gets an unsafe dose.
  • Follow exact step-by-step procedures every time, with zero shortcuts.
Decisions you’ll make
  • Is this reactor reading a real anomaly, or just a sensor glitch?
  • Do I shut down the system now, or can I safely troubleshoot while underway?
  • Is my teammate's mistake serious enough to report up the chain immediately?
  • Have I followed every step of this procedure exactly, or am I cutting a corner?
  • Is my crew ready to handle this watch, or do I need to step in?
Education Pathways · how you get there
34 in 100 went the college route · 66 in 100 found another way in None, typically

People usually reach this work through experience rather than a college program.

Explore more colleges
Education mapped from O*NET:
If you like this, also look at