Michigan registers — it does not license — boiler operators and stationary engineers under the Skilled Trades Regulation Act, through the Department of Licensing and Regulatory Affairs’ Bureau of Construction Codes. Five classifications run by boiler heating surface: low and high pressure boiler operators to four thousand square feet, then third, second, and first class stationary engineers at seventy-five hundred, twenty thousand, and above twenty thousand square feet. The current skilled trades rules adopt the NIULPE written examination for every classification, and NIULPE certification precedes the state application.
This program is part of the expanding PassProfessor catalog — join the notify list and we’ll email you when enrollment opens.
What this registration authorizes
Michigan is the registration state in this family, and the vocabulary is the first fact to get right: under Article 9 of the Skilled Trades Regulation Act (2016 PA 407), the Department of Licensing and Regulatory Affairs, through its Bureau of Construction Codes, registers boiler operators and stationary engineers — it does not license them. The classifications are set by section 933 of the Act (MCL 339.5933) and measured in the aggregate square feet of boiler heating surface of the plant, with steam engine-turbine horsepower as the alternative measure: low pressure boiler operators run low-pressure plants of not more than four thousand square feet; high pressure boiler operators run plants of not more than four thousand square feet or not more than ten steam engine-turbine horsepower; third-class stationary engineers reach seven thousand five hundred square feet or one hundred horsepower; second-class reach twenty thousand square feet or two hundred horsepower; first-class stationary engineers run plants of twenty thousand square feet or more, or two hundred horsepower or more.
The examination structure is Michigan’s second distinctive feature. The current Skilled Trades Regulation Rules (Part 9, effective May 3, 2023) adopt the examination prepared by the National Institute for Uniform Licensing of Power Engineers — NIULPE — and provide that the written examination for all classifications of boiler operator and stationary engineer must be delivered and administered by NIULPE. The Bureau’s current application (form BCC-0509, revised February 2025) states the sequence plainly: NIULPE certification is required prior to submission of the application, and the applicant provides proof of it. Michigan has, in effect, outsourced its operator examination to the national power-engineering institute and kept registration, experience review, and fees for itself.
The examination at a glance
| Item | Verified position |
|---|---|
| Credential | Registration (not licensing) as a boiler operator or stationary engineer — State of Michigan |
| Regulator | Bureau of Construction Codes, Michigan Department of Licensing and Regulatory Affairs (LARA), under the Board of Boiler Rules framework of the Skilled Trades Regulation Act |
| Legal basis | Skilled Trades Regulation Act, 2016 PA 407, Article 9 (MCL 339.5901 et seq.); classifications at MCL 339.5933; qualifications at MCL 339.5937; Skilled Trades Regulation Rules Part 9 (2023) |
| Low Pressure Boiler Operator | Low-pressure boiler plants with an aggregate of not more than 4,000 square feet of boiler heating surface |
| High Pressure Boiler Operator | Boiler plants with an aggregate of not more than 4,000 square feet of heating surface, or not more than 10 steam engine-turbine horsepower |
| Third-Class Stationary Engineer | Not more than 7,500 square feet of heating surface, or not more than 100 steam engine-turbine horsepower |
| Second-Class Stationary Engineer | Not more than 20,000 square feet of heating surface, or not more than 200 steam engine-turbine horsepower |
| First-Class Stationary Engineer | 20,000 square feet or more of heating surface, or 200 steam engine-turbine horsepower or more |
| Examination | Written examination prepared by the National Institute for Uniform Licensing of Power Engineers (NIULPE), adopted by rule R 339.5171; the written examination for all classifications must be delivered and administered by NIULPE; NIULPE certification is required before the state application (BCC-0509) |
| Registration fees (current rules/application) | Boiler operator registration $80; stationary engineer registration $100; renewals $80 (operator) — per the fee schedule at R 339.5176 and the BCC application (operator classes $80; engineer classes $100) |
| Experience qualifications | Set by classification at MCL 339.5937 — from one year operating or maintaining boilers for the low pressure operator, to the first-class routes built on second-class registration plus experience, or six years in plants over 20,000 square feet |
| Out-of-state route | The department may register without examination an applicant licensed or registered in another jurisdiction whose requirements are at minimum substantially equivalent (per the BCC application, citing MCL 339.5907(3)); NIULPE certification proof may be replaced by such a current licence |
The five classifications of section 933
Each classification states its plant ceiling from MCL 339.5933 and the headline qualification routes from MCL 339.5937; the statute offers multiple alternative routes for the operator and engineer classes, and the Bureau’s application should be read for the route an individual candidate will document.
Low Pressure Boiler Operator — 4,000 square feet, low pressure
The base registration: operation of low-pressure boiler plants whose aggregate heating surface is not more than four thousand square feet. The qualification is a single sentence in the statute — at least one year of experience operating or maintaining low or high pressure boilers, steam prime movers, or associated auxiliaries. The registration fee on the Bureau’s application is eighty dollars, and the examination is the NIULPE written examination for the classification, taken before the state application is submitted.
High Pressure Boiler Operator — 4,000 square feet or 10 horsepower
The same heating-surface ceiling as the low pressure operator — four thousand square feet in aggregate — but for high-pressure plants, with the alternative ceiling of not more than ten steam engine-turbine horsepower where the plant is measured that way. Qualification is by one of several routes, headed by at least two years of experience in the operation of a high pressure boiler, with the statute’s alternative combinations of operating, maintenance, and education-program experience beside it. Registration is eighty dollars on the Bureau’s schedule.
Third-Class Stationary Engineer — 7,500 square feet or 100 horsepower
The first engineer registration: plants of not more than seven thousand five hundred square feet of aggregate heating surface, or not more than one hundred steam engine-turbine horsepower. The statute’s headline routes include registration as a high pressure boiler operator with at least one year operating a high pressure boiler; the low pressure operator route combining a year on low pressure boilers with a year of maintenance experience on high pressure boilers and auxiliaries; and plant-experience routes measured in thousands of square feet of heating surface combined with steam prime mover experience. Registration is one hundred dollars.
Second-Class Stationary Engineer — 20,000 square feet or 200 horsepower
Plants of not more than twenty thousand square feet, or two hundred steam engine-turbine horsepower. The headline route is registration as a third-class stationary engineer with at least one year of experience as a third-class engineer; the alternatives include four years operating boilers in a high pressure plant of more than seven thousand five hundred square feet of aggregate heating surface, and combined boiler-and-prime-mover routes totalling four years. Registration is one hundred dollars.
First-Class Stationary Engineer — 20,000 square feet and above
The unlimited registration: plants with an aggregate of twenty thousand square feet or more of boiler heating surface, or two hundred or more steam engine-turbine horsepower. The headline qualification is registration as a second-class stationary engineer with at least two years of experience as a second-class engineer; the alternatives run to six years of experience in the operation of boilers in a high pressure plant of more than twenty thousand square feet, or combined routes totalling six years with prime movers over two hundred horsepower. Registration is one hundred dollars.
Who this licence serves
Michigan’s registered operators and engineers staff the boiler plants of the state’s manufacturing base, its hospitals and universities, and its municipal and commercial buildings. The heating-surface measure suits that stock: Michigan plant is described, bought, and insured by heating surface as readily as by horsepower, and the registration classes let an employer match a registrant to a plant from the plant’s own aggregate figure.
The NIULPE structure suits the workforce in a second way: the examination credential is national. A Michigan registrant’s NIULPE certification is the same institute credential other NIULPE jurisdictions recognize, so the Michigan operator’s examination achievement is legible well beyond the state’s registration system — even though the registration itself remains Michigan’s.
The route, in order
The route runs examination-first, in the opposite order from most states in this family. The candidate qualifies their experience against MCL 339.5937 for the classification sought, sits the NIULPE written examination for that classification and earns NIULPE certification, and only then applies to the Bureau of Construction Codes — on form BCC-0509, online through the state’s licensing portal or by mail — with proof of NIULPE certification and the documents supporting the required experience. The examination fee is paid to the testing agency when the examination is scheduled; the registration fee — eighty dollars for the operator classes, one hundred for the engineer classes — accompanies the state application.
Registration, once issued, is renewed on the fee schedule’s terms — eighty dollars for a boiler operator registration renewal on the current schedule. Applicants holding a current licence or registration from another jurisdiction with substantially equivalent requirements may present it in lieu of NIULPE certification, and the Act empowers the department to register such an applicant without examination; both provisions are the department’s to apply, on the documents presented.
What makes this examination demanding
Michigan’s examination demand is NIULPE’s demand: a national power-engineering syllabus, examined by classification, by an institute whose certification levels the Michigan classes are built on. The candidate is not preparing for a state clerk’s quiz on Michigan rules — though the Michigan article and rules frame the registration — but for the NIULPE written examination at the level of the classification sought, with the institute’s published certification requirements for that level as the outline. Preparation that ignores the NIULPE level structure misunderstands what Michigan has adopted.
The second demand is documentary and unit-bound. Every qualification route in section 937 is quantified — years, square feet of aggregate heating surface, prime-mover horsepower — and the application requires the documents supporting the required experience. A candidate whose experience is real but recorded in the wrong units, or whose plant’s aggregate figure was never established, has an application problem before they have an examination problem; Michigan candidates should build the plant’s heating-surface record as carefully as they build their knowledge.
The credential at work
Registration gives the Michigan operator a state credential whose classes employers can read directly off a plant’s aggregate heating surface — and the NIULPE certification underneath it gives the same operator a national credential that travels. The pairing is the Michigan system’s career logic: the state registration authorizes and classifies the work at home, while the institute certification evidences the examined competence anywhere power engineers are hired. For the first-class registrant of a large industrial plant, the two together describe both the legal authority and the professional standing of the person in charge.
What the PassProfessor program will cover
Practice in the examination’s own shape. Michigan’s route examines through NIULPE: a written examination at the level of the classification sought, delivered and administered by NIULPE under the state’s adopted rules. The program in the works practises in that shape: single-best-answer items and timed sets organized by classification level, from the operator classes to first class, with Michigan’s own frame — the section 933 ceilings, the section 937 routes, and the registration sequence — carried as the state layer on the institute’s syllabus.
Written from the primary sources. The program is written from the Skilled Trades Regulation Act — sections 933 and 937 for the classifications and qualifications — from the 2023 Skilled Trades Regulation Rules Part 9 adopting the NIULPE examination, and from the Bureau of Construction Codes’ current application. Where Michigan’s heating-surface registration differs from other states’ horsepower licensing, the program teaches the Michigan figures and names the difference.
The whole candidate, not only the test-taker. Around the item practice, the program carries the Bureau of Construction Codes route as the authority publishes it — NIULPE examination and certification first, documented experience reviewed by the Bureau, then registration — because a written examination is a means to a licence, and candidates plan better when the destination is mapped.
Preparation only. This is preparation for the NIULPE written examination Michigan’s rules adopt for these classifications. PassProfessor is not affiliated with NIULPE, LARA, or the Bureau of Construction Codes, no completion of this program is reported to any of them, and nothing in the program substitutes for the documented experience any classification requires, for NIULPE certification, or for any step in the registration process.
Tell me when enrollment opens. The Michigan Boiler Operator and Stationary Engineer Registration program is in the works and enrollment is not yet open. Leave an email address and PassProfessor will write to you when the program is ready — and only about this program. No date is promised, because the program will open when it meets the standard described above, not before.
Frequently asked questions
Does Michigan license or register boiler operators?
Register. Under Article 9 of the Skilled Trades Regulation Act, the Department of Licensing and Regulatory Affairs (Bureau of Construction Codes) issues registrations — the credential’s correct name matters, because Michigan law uses registration, not licensing, for these titles.
What are the classifications?
Low pressure boiler operator and high pressure boiler operator (plants to 4,000 square feet of aggregate heating surface; the high pressure class alternatively to 10 steam engine-turbine horsepower), then third-class (7,500 sq ft / 100 hp), second-class (20,000 sq ft / 200 hp), and first-class (20,000 sq ft or more / 200 hp or more) stationary engineers, per MCL 339.5933.
What examination does Michigan use?
The written examination prepared by NIULPE — the National Institute for Uniform Licensing of Power Engineers. The current skilled trades rules (R 339.5171) adopt the NIULPE examination and provide that the written examination for all classifications must be delivered and administered by NIULPE.
When do I take the examination relative to applying?
Before. The Bureau’s current application (BCC-0509) states that NIULPE certification is required prior to submission of the application, with proof provided.
What does registration cost?
On the current schedule: eighty dollars for boiler operator registration, one hundred dollars for stationary engineer registration; the examination fee is paid to the testing agency at scheduling. A boiler operator registration renewal is eighty dollars.
What experience does the low pressure operator need?
At least one year of experience operating or maintaining low or high pressure boilers, steam prime movers, or associated auxiliaries, per MCL 339.5937.
How does a first-class registrant qualify?
By the headline route: registration as a second-class stationary engineer plus at least two years of experience as a second-class engineer — or the statute’s alternatives, up to six years in high pressure plants over 20,000 square feet of aggregate heating surface.
I am licensed in another state. Must I take the NIULPE examination?
Not necessarily: the application provides that a current licence or registration from a jurisdiction with substantially equivalent requirements may be submitted in lieu of NIULPE certification, and the department may register such an applicant without examination. The determination is the department’s.
Why heating surface instead of horsepower?
Because section 933 classifies by it: aggregate square feet of boiler heating surface is Michigan’s primary plant measure for these registrations, with steam engine-turbine horsepower as the alternative measure.
Is PassProfessor affiliated with NIULPE or LARA?
No. PassProfessor is an independent preparation provider. The program confers no registration or certification and reports nothing to NIULPE or the Department.