EXPOSED
Most of the day is physical: walking the plant, reading gauges and sight glasses, blowing down boilers, packing pumps, changing filters and belts, chemically treating water, and hand-cranking valves during a chiller changeover — none of which robotics touches at usable cost today. What AI and building automation systems do erode is the monitoring and logging tier: trend analysis, load scheduling, alarm triage, and the hourly log sheet are increasingly handled by BAS platforms and remote monitoring centers, which is why one operator now covers plants that used to need three. Many jurisdictions still require a licensed boiler operator physically on site for high-pressure plants, and that licensure — a regulatory shield, not a technical one — is the single biggest thing holding headcount up.
Part 2020 shock, part continued decline in the years since.
Median pay $62,150 → $78,620 +1.2% in real terms
This line is counted by the Bureau of Labor Statistics — the one figure on this page that isn't a judgement of ours. Headcount moves on demand, offshoring, demographics and the business cycle, and automation is one term among several, often not the loudest.
So a falling line is not evidence that AI did it, and a rising one is not evidence that it won't. Both happen in this register: some occupations resist automation and shrink anyway, others are highly automatable and keep growing. The marked year is 2020.
BLS projection, 2024–2034
+2.2%
Percentage only. The projection counts a different population from the 28,250 above — it includes self-employed workers, which for this occupation is most of them, so the two headcounts are not comparable.
Growing, and only partly exposed
The BLS expects +2.2% more of these jobs by 2034, and at 64/100 the work is only partly exposed — some tasks are automatable, the core of the job is not. Nothing here is in tension.
Different clocks. The score is what current AI could do to this work today. The projection is how many of these jobs will exist in 2034. Everything between the two — how fast employers actually adopt, whether demand grows in the meantime — is why they can point opposite ways without either being wrong.
~3,800 openings a year on average, including replacing people who leave.
PlugmanEngineerOperatorEnginemanFan RunnerMarine FirerRetort FirerWater PumperBoiler FiremanExhaust WorkerPlant EngineerPower OperatorSteam EngineerTurbo OperatorWatch EngineerBoiler EngineerBoiler OperatorBlowing EngineerBreaker EngineerTurbine OperatorUtilities ManagerAir Plant EngineerAuxiliary OperatorByproduct Engineer
Holding it up: embodiment . Weakest point: trust premium .
Mixed — a routine tier and a judgment tier The wrench work — repacking a leaking pump, replacing gaskets on a heat exchanger, rodding tubes, running a low-water cutoff test — stays manual, but the round-the-clock watchkeeping that justified three shifts is exactly what BAS trending and remote alarm centers absorbed, so this lands at 13 rather than 17: the hands survive, the watch does not.
Hands-on in uncontrolled environments You are in the boiler room, on ladders, in confined spaces, inside a crawlspace chasing a steam leak, working around 150 psi headers, hot condensate, refrigerant, and caustic water-treatment chemicals — 17 not 20 only because the plant itself is a fixed, mapped, indoor space rather than an open field or a rooftop in weather.
Licensed human required and personally liable State and municipal codes (Chicago, New York, Massachusetts 1st/2nd class engineer, most high-pressure jurisdictions) require a named licensed operator on the premises, and a failed inspection or an incident traces to your license — 12 rather than 18 because low-pressure and unfired-vessel plants in many states need no license at all, so the shield covers part of the occupation, not all of it.
Exists to be accountable for ambiguous calls When the low-water alarm and the sight glass disagree at 3 a.m., you decide whether to secure the boiler and drop heat to the building or keep firing, and the same call governs a refrigerant leak, a nuisance flame-failure lockout, or bringing a cold boiler up on a February morning without thermal-shocking it — 15 because the consequences run to explosion and ASME/NBIC scrutiny, held below 18 by the fact that written operating procedures and lockout/tagout cover the routine sequences.
The verdict above describes this occupation as a whole. Almost nobody does the typical version of a job — tick what's actually in your week and see how your own mix sits.
Your task mix speaks to task resistance (13/20 here) — how much of the day's work current AI already does. That is the dimension the boxes above are about.
It cannot move the other three. Liability shield (12/20) is whether the law requires a licensed human to sign. Trust premium (7/20) is whether buyers specifically pay for a person. Judgment and accountability (15/20) is whether the role exists to own consequential calls. Those are facts about the occupation's standing, not about which tasks are in your week — a paralegal who does only trial exhibits still holds no licence. Together they are 34 of this occupation's 64 points (53%).
Embodiment (17/20) is also a property of the work rather than the worker, but we don't tag individual tasks as physical or not, so the picker can't tell you anything about it. That's a limit of this tool, not a claim.
Did we get the list right? Tell us what's missing — the tasks are written from the outside, and you're reading this from the inside.
No occupation passed every test: close enough to stationary engineers and boiler operators on skills and subject matter, at least 10 points more resistant, no big jump in training, no new licence, no pay cut, and not shrinking on its own. That happens for 223 of the 654 occupations here that aren't SAFE, and it is worth stating plainly rather than leaving the section off.
The usual reason is that exposure travels with the skill profile. The jobs most similar to yours tend to be exposed for the same reasons yours is, so the near neighbours don't clear the gap — and the ones that do are a different kind of work, not a transfer of what you already know. Read that as a limit of this method, not a verdict that you're stuck: it only compares whole occupations, and it cannot see specialisation, industry, or anything you'd bring that isn't in a federal skill survey.
Here is that claim on your own job rather than in the abstract. These are the three occupations closest to this one by skill and subject matter — the places the work would most naturally transfer — with what the register scores them:
That is the whole problem in three lines. The nearest work is not meaningfully safer, so there is no move here that trades a similar skill set for a better verdict. This is not us running out of ideas — it is what the neighbourhood looks like.
The moves above are yours to make. This is the other half: what would have to change in the world for the occupation itself to score higher. None of it is in any one person's gift, but it is where the floor actually comes from. Scores here are not a one-way ratchet. Only two of the five dimensions — task resistance and embodiment — track what machines can do. The other three track law, what buyers will pay for, and who is answerable, and those move in both directions, often in response to the same pressure AI creates. If every lever below landed, this occupation would score around 78/100 — SAFE.
Boiler and machinery insurers (Hartford Steam Boiler, FM Global) conditioning coverage on a licensed operator physically walking and countersigning daily inspection records rather than accepting remote monitoring center logs — an underwriting requirement, not a statute, but functionally binding on hospitals, universities and district energy plants.
Genuine two-tier structure: if remote monitoring centers take over the hourly log and alarm sorting, what remains on site is diagnostic hands-on work — packing pumps, chasing a tube leak, water chemistry troubleshooting, retubing coordination, valve rebuilds — which is the fraction AI cannot do. Task-mix shift alone raises this without any new law, though it comes bundled with fewer positions.
State and municipal boiler codes retaining or restoring mandatory continuous-attendance rules for high-pressure plants — e.g. a state board of boiler rules (NY, PA, Ohio, Massachusetts) declining to grant 'unattended' or 'limited-attendance' operating permits for automated boilers above a pressure/BTU threshold, and requiring a named licensed operator of record personally liable for logs and safety-valve testing. The reverse motion is already visible: ASME CSD-1 and NFPA 85 based unattended-boiler allowances plus insurer sign-off let jurisdictions reduce attendance, so watch specific state rulemaking dockets either way.
As BAS platforms absorb trending, load scheduling and alarm triage, the residual role concentrates in abnormal-condition calls: low-water cutout failure, carryover, refrigerant leak evacuation decisions, deciding whether to drop a chiller during a heat event in an occupied hospital. If facilities employers formalize the operator as the incident-command authority for plant shutdown (as many hospital emergency operations plans already do under Joint Commission utility-management standards), the accountability tier hardens.
Little headroom; the work is already near-ceiling physical. Marginal increase only if plants push more in-house mechanical repair onto operators instead of outside contractors, e.g. multi-skilling clauses in IUOE local agreements that fold millwright and refrigeration mechanic tasks into the operator classification.
The limit. Trust premium has no realistic route: the buyer is a facilities budget owner who wants uptime at lowest cost and has no preference for a human per se — nobody pays extra to know a person read the sight glass. The entire defensible position is licensure and insurer attendance requirements, and the observable regulatory motion (unattended-boiler permits under CSD-1/NFPA 85) currently runs the other direction. Even with every lever above, headcount consolidation continues; the score describes the job's resistance, not the number of jobs.
| New York-Newark-Jersey City, NY-NJ | 3,810 | $104,810 +33% |
| Los Angeles-Long Beach-Anaheim, CA | 1,980 | $74,420 -5% |
| Chicago-Naperville-Elgin, IL-IN | 1,210 | $115,780 +47% |
| San Francisco-Oakland-Fremont, CA | 980 | $129,930 +65% |
| Washington-Arlington-Alexandria, DC-VA-MD-WV | 970 | $91,480 +16% |
| Minneapolis-St. Paul-Bloomington, MN-WI | 750 | $76,560 -3% |
| Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | 740 | $79,720 +1% |
| Sacramento-Roseville-Folsom, CA | 520 | $99,840 +27% |
| San Francisco-Oakland-Fremont, CA | 980 | $129,930 +65% |
| San Jose-Sunnyvale-Santa Clara, CA | 210 | $123,170 +57% |
| Vallejo, CA | 110 | $123,170 +57% |
We have no reported case of a named organisation automating this occupation. Not one deployment, not one announcement.
That is worth saying out loud next to a score of 64. The verdict above is about what the work exposes — what current AI could do to these tasks. It is not a claim that anyone has done it. For this occupation those two things have come apart completely: the capability argument is on this page, and the evidence column is empty.
Has AI actually changed your work? One tap, anonymous, and the running tally is public. Nothing else is asked of you.
Rather than check back: get the digest and we'll tell you what changed — or watch a single occupation from its own page.