Marine Engineer
Operating a commercial ship's engine room requires a US Coast Guard-issued engineering license under 46 CFR Part 11 — five years of documented service, an STCW Officer-in-Charge-of-Engineering-Watch endorsement, and a Coast Guard exam for even the entry-level license, renewable only through further sea service or refresher training.
In real usage data, AI shows up in this job less often than in most occupations.
Technical detail
Based on Microsoft's "Working with AI" study of real Copilot conversations mapped to O*NET tasks (arXiv 2507.07935): Ship Engineers scored 0.025 on AI applicability, notably below the cross-occupation mean (0.159, stdev 0.098) across all 785 SOC codes studied — banded here as Low real-world AI usage relative to other occupations.
What a marine engineer actually does
Shipboard marine engineers — officially "ship engineers" — operate and maintain a vessel's engine room while it's underway: the main propulsion engines, boilers, generators, and the deck machinery, refrigeration, and sanitary systems that keep a ship running for weeks at sea.
The work means monitoring engine indicators and gauges through a watch, diagnosing a malfunction from an unusual vibration, temperature reading, or sound long before it becomes a breakdown, performing repairs at sea with whatever parts and tools are aboard, and sometimes fabricating a replacement part when no spare exists.
Engineers keep detailed engine-room logs, coordinate with the captain on fuel and mechanical status, and act as the technical liaison between the ship and shore-side engineering staff when the vessel is in port. Larger ships carry a hierarchy of engineering officers — chief, first, second, and third engineer — each responsible for specific systems and watch periods.
The job is licensed and demanding: a US Chief Engineer credential requires five years of documented engine-room service, a Coast Guard exam, and STCW certification, built up over years the way a ship captain's license is.
Why it reads this way
Operating a commercial ship's engine room requires a US Coast Guard-issued engineering license under 46 CFR Part 11 — five years of documented service, an STCW Officer-in-Charge-of-Engineering-Watch endorsement, and a Coast Guard exam for even the entry-level license, renewable only through further sea service or refresher training.
Real AI tools exist in this space — Kongsberg's Intelligent Energy Management System and Condition Monitoring Solution, and Wärtsilä's predictive-maintenance integration — but vendors and industry coverage consistently describe these as tools that "support human crews, not replace them," feeding data to the licensed engineer rather than acting on it independently.
Reduced-crew engine rooms do exist under long-standing "periodically unattended machinery space" classifications, letting a ship run without someone physically standing watch around the clock, but this only reduces watch-standing headcount on vessels that still require a licensed chief or assistant engineer aboard or on call — it doesn't remove the engineer's role. No fleet-scale unmanned or fully autonomous engine room operates in commercial service today.
The hands-on diagnostic work — tracing an unusual vibration to its source, fabricating a part with no spare available, judging whether a system can hold until the next port — remains something the sensors flag but a licensed human still has to interpret and act on.
Skills this role draws on
We don't yet have task-by-task time-share data for this occupation, so we can't show which specific tasks carry the exposure score above. This is the real skill set instead.
Typical salary range (USD)
$55,000–$145,000
Average: $94,270/yr
Range source: BLS Occupational Employment and Wage Statistics, May 2023
Average source: BLS Occupational Employment and Wage Statistics, Ship Engineers (53-5031), May 2023 (Median Annual Wage)
Nearest jobs by score
Related careers
Head-to-head comparisons
Marine Engineer (shipboard Ship Engineer, O*NET 53-5031.00 — distinct from the naval-architecture code 17-2121.00) scores 74/100 (Safe band), corroborated by a Low Microsoft usage band, one of the lowest AI-applicability scores in this batch. Operating a commercial ship's engine room requires a Coast Guard engineering license under 46 CFR Part 11 — five years of documented service, an STCW watch-officer endorsement, and a Coast Guard exam even for the entry-level license. Real AI condition-monitoring tools exist (Kongsberg's Intelligent Energy Management System and Condition Monitoring Solution, Wärtsilä's predictive-maintenance integration), but industry coverage consistently frames these as supporting the licensed crew, not replacing it. Reduced-crew 'periodically unattended machinery space' operation has existed for decades and reduces watch-standing headcount, not the engineer role — a licensed chief or assistant engineer is still required aboard or on call. No fleet-scale unmanned engine room operates in commercial service today. The hands-on diagnostic work this job runs on — tracing an unusual vibration to its source, fabricating a part with no spare available — is exactly the kind of judgment the sensor systems flag but still route to a human to interpret.
This is a researched judgment (checklist v1.2), not a statistical measurement — it sits alongside, not instead of, the structural exposure signal above. Next scheduled review: 2027-02-10.
Sources (6)
- https://www.bls.gov/oes/2023/may/oes535031.htm
- https://www.kongsberg.com/maritime/products2/systems/intelligent-maritime-energy-management/
- https://www.kongsberg.com/maritime/products/engines-engine-room-and-automation-systems/condition-monitoring/
- https://www.ecfr.gov/current/title-46/chapter-I/subchapter-B/part-11/subpart-E
- https://www.edumaritime.net/uscg-mmc/uscg-chief-engineer-requirements
- https://www.onetonline.org/link/summary/53-5031.00
Data sources & methodology
Salary data: BLS Occupational Employment and Wage Statistics, May 2023. Min/max figures represent the 10th–90th percentile annual wage range across the United States. Average figure sourced separately: BLS Occupational Employment and Wage Statistics, Ship Engineers (53-5031), May 2023 (Median Annual Wage).
Automation Risk Score: Based on O*NET occupational analysis (53-5031.00) evaluating task complexity, physical requirements, social intelligence, and environmental variability. Methodology based on research from Frey & Osborne (Oxford, 2017).
Growth projections: 1-3% (2024-2034, estimated from adjacent water transportation occupations), based on BLS Occupational Outlook Handbook.