40+ interviewer questions across technical depth, preventive maintenance, safety, and crew leadership, each with what a strong answer sounds like, plus a 1 to 5 scorecard and a red flag checklist. Built for small businesses without HR. Download as DOCX.
The first maintenance supervisor I ever helped a client hire was the best technician on the crew, and the promotion went badly for eighteen months. He could fix anything. He had never built a schedule, never argued a budget, and never told a friend he had worked beside for a decade that his work had slipped. Nobody had interviewed him for any of that, because nobody had thought to ask.
That is the trap with this role. A maintenance supervisor is judged on breakdowns that never happen, and the interview questions that circulate online mostly test wrench skill, which is the part a candidate is least likely to be missing. The questions that actually predict the hire are about planning, safety ownership, and how someone runs a crew when a line is down and the owner is standing behind them.
At FirstHR, we build for small businesses that hire without an HR department, where the owner or the operations lead runs the whole interview alone. This page gives you 40+ interviewer questions grouped by competency, each with what a strong answer sounds like, plus a downloadable 1 to 5 scorecard and a red flag checklist so the decision rests on written evidence.
TL;DR
Interview a maintenance supervisor across five areas: technical and trade depth, preventive maintenance and planning, safety and compliance, crew leadership and scheduling, and behavioral evidence. Press hardest on planning and on the full lockout and tagout sequence, since those separate a supervisor from a senior technician. Score every candidate on the same 1 to 5 rubric. Download 40+ questions and the scorecard as DOCX.
What to Assess in a Maintenance Supervisor
Assess planning and safety ownership at least as hard as technical skill, because those are the duties a promoted technician has usually never performed. The supervisor decides what should never break, defends the budget that makes that possible, and owns energy isolation for everyone on the crew.
Technical depth still matters, but you are testing judgment rather than encyclopedic recall. A strong candidate separates a symptom from a root cause, names specific failure modes on specific equipment, and says plainly where their license stops. Confidence without specifics is the pattern that costs you money.
The most reliable way to compare candidates is a structured interview: the same core questions in the same order, scored against the same rubric. It matters more here than in most roles, because maintenance candidates arrive from plants, facilities teams, property management, and the trades, and their resumes are not comparable on their face.
The Five Question Categories
The questions below are grouped into five competencies plus a scorecard. Each targets a different part of the job, and a real supervisor should hold up across all of them rather than only in the technical set they have answered a hundred times.
Technical and Trade Knowledge
Can they diagnose?
Which trades they are strong in, how they separate symptom from root cause, and where their license stops. Honesty about weak areas matters as much as depth.
Preventive Maintenance and Planning
Can they stop the fires?
Building a PM schedule, tracking downtime and backlog, managing spares, and defending a budget. The part a great technician has usually never done.
Safety and Compliance
Do they own the risk?
Lockout and tagout including verification, permits, hazard analysis, incident response, and provable training records. Never skip this set.
Leadership and Scheduling
Can they run a crew?
Assigning work across skill levels, covering on-call, training new technicians, and handling a technician whose quality is slipping.
Behavioral and Situational
How do they really operate?
STAR questions about costly breakdowns, disagreements with operations, and a diagnosis they got wrong. Past behavior beats stated intentions.
Scorecard and Red Flags
Score, do not guess
A 1 to 5 rubric per competency plus an automatic red flag checklist, so the decision rests on written evidence rather than the interview that felt best.
Weight Planning and Safety, Not Just the Technical Set
Candidates rehearse technical answers most, because that is what every online list asks. The categories that separate a supervisor from a senior technician are preventive maintenance and planning, where vague answers are the loudest possible signal, and safety, where you are listening for a verification step rather than a recital. If you are promoting someone from your own crew, weight those two categories heaviest, and compare their answers against the duties in the maintenance supervisor job description you are hiring against.
40+ Questions and a Scorecard to Download
Download all six as a single Word document, or copy individual sets. Each one lists how to use it, the questions with good-answer notes, what a strong answer looks like, and space for notes. The final file is the scorecard with an automatic red flag checklist.
Download All Questions and the Scorecard
Five question sets by competency plus a 1 to 5 scoring rubric and red flag checklist. All in one DOCX.
Set 1: Technical and Trade Knowledge
Which trades the candidate is strong and weak in, how they diagnose, and where their license stops. You are testing judgment, not recall.
Technical and Trade Knowledge Questions
MAINTENANCE SUPERVISOR INTERVIEW: TECHNICAL AND TRADE KNOWLEDGE
Candidate: __
Site or facility: __
Interviewer: __
Date: __
HOW TO USE THIS SET
Ask six to eight of these. You are not testing whether the candidate can pass a
trade exam. You are testing whether they can diagnose, decide, and tell you where
their own limits are. Use the good-answer notes to judge the response even if you
have never held a multimeter yourself.
QUESTIONS TO ASK
1. Which trades are you strongest in: electrical, mechanical, plumbing, HVAC,
or controls? Which are you weakest in?
(Good answer: picks two or three and is honest about the rest.)
2. Walk me through how you would diagnose a motor that keeps tripping its
breaker.
(Good answer: separates symptom from root cause, checks load, insulation,
alignment, and bearings before replacing parts.)
3. Describe your experience with PLCs, VFDs, or building automation controls.
4. How do you decide whether to repair something in house or call a licensed
contractor?
(Good answer: ties the line to license scope, permit requirements, risk,
and warranty, not to pride.)
5. What licenses or certifications do you hold, and what do they let you sign
off on?
6. Tell me about a repair you made that other people had already failed at.
7. How do you use equipment manuals, wiring schematics, and manufacturer specs
on a live job?
8. What is the most complex system you have personally maintained, and what
went wrong with it most often?
WHAT A STRONG ANSWER LOOKS LIKE
A strong candidate names specific equipment and specific failure modes, and
separates the symptom from the root cause instead of swapping parts until the
noise stops. They are open about which trades they are weak in and where their
license stops, because a supervisor who oversteps a license creates liability
for you. Watch for the opposite pattern: a candidate who claims to be expert in
everything and gives no detail on any of it.
NOTES
[Capture specific equipment, failure modes, and red flags here.]
Set 2: Preventive Maintenance and Planning
Building a schedule from nothing, tracking downtime and backlog, managing spares, and defending a budget. The set that separates a supervisor from a technician.
Preventive Maintenance and Planning Questions
MAINTENANCE SUPERVISOR INTERVIEW: PREVENTIVE MAINTENANCE AND PLANNING
Candidate: __
Site or facility: __
Interviewer: __
Date: __
HOW TO USE THIS SET
This is the set that separates a supervisor from a senior technician. A
technician fixes what broke. A supervisor decides what should never break in the
first place, and can show you the schedule, the parts, and the numbers behind
that decision.
QUESTIONS TO ASK
1. How would you build a preventive maintenance schedule for equipment that has
never had one?
(Good answer: starts from manufacturer intervals and criticality, not from a
generic calendar.)
2. Which maintenance metrics do you track, and why those?
(Good answer: names real ones such as PM completion rate, unplanned downtime,
mean time between failures, mean time to repair, and backlog.)
3. Three work orders land at once and you have two technicians. How do you
decide the order?
4. Walk me through how you manage spare parts and decide what to keep as a
critical spare.
5. Which CMMS or work order system have you used, and which reports do you
actually open?
6. How do you plan a shutdown so the work fits the window you were given?
7. Describe how you would move a site from mostly reactive repairs toward
planned work.
(Good answer: gives a sequence and a realistic timeline, usually measured in
quarters, not weeks.)
8. How do you build a maintenance budget, and how do you defend it when someone
wants to cut it?
WHAT A STRONG ANSWER LOOKS LIKE
Strong candidates talk in ratios and dates. They can tell you roughly what share
of their work was planned versus reactive, how they measured backlog, and what
they changed to shift the split. They treat preventive maintenance as a budget
argument they have to win, not a wish list. Vague answers here are the single
most useful signal in the whole interview, because planning is the part of the
job a great technician has usually never done.
NOTES
[Capture metrics, systems used, and planned versus reactive split here.]
Still Using Spreadsheets for Onboarding?
Automate documents, training assignments, task management, and track onboarding progress in real time.
Lockout and tagout including verification, permits, hazard analysis, incident response, and provable training records. Ask every candidate all of these.
Safety and Compliance Questions
MAINTENANCE SUPERVISOR INTERVIEW: SAFETY AND COMPLIANCE
Candidate: __
Site or facility: __
Interviewer: __
Date: __
HOW TO USE THIS SET
Do not skip this set and do not soften it. The maintenance supervisor is the
person who owns energy isolation, permits, and crew training records at most
small sites. Ask every candidate the same safety questions and write down the
answers.
QUESTIONS TO ASK
1. Walk me through your lockout and tagout procedure from start to finish.
(Good answer: identifies every energy source, isolates, locks, tags, releases
stored energy, and verifies the equipment will not start before work begins.)
2. How do you handle group lockout when three people are working on one machine?
3. How do you run a hazard analysis before a nonroutine or first-time repair?
4. What is your experience with confined space entry and hot work permits?
5. A technician skips a safety step to save twenty minutes and nothing goes
wrong. What do you do?
(Good answer: addresses it immediately and treats the near miss as a real
event, regardless of the outcome.)
6. What is your process after a near miss or an injury?
7. How do you keep crew training and certification records current and provable?
8. How do you manage outside contractors so they follow your site rules?
WHAT A STRONG ANSWER LOOKS LIKE
The strongest tell is the verification step. Many candidates can recite lock and
tag, but a real practitioner always confirms the equipment cannot start before
anyone puts hands on it, and describes stored energy such as springs, hydraulics,
capacitors, and gravity loads. Listen for someone who treats a near miss as
reportable and who keeps written training records. A supervisor who talks about
safety as paperwork rather than sequence is a genuine risk to your crew.
NOTES
[Capture the lockout sequence, permit experience, and record keeping here.]
Set 4: Leadership, Scheduling, and Crew Management
Assigning work across skill levels, covering on-call, training a new technician, and handling a technician whose quality is slipping.
Leadership, Scheduling, and Crew Management Questions
MAINTENANCE SUPERVISOR INTERVIEW: LEADERSHIP, SCHEDULING, AND CREW
Candidate: __
Site or facility: __
Interviewer: __
Date: __
HOW TO USE THIS SET
Most maintenance supervisors are promoted technicians, so this is the set where
the gap usually shows. Ask for the mechanics of how they run a crew, not for a
philosophy of leadership.
QUESTIONS TO ASK
1. How do you assign work across a crew with very different skill levels?
2. Walk me through how you cover nights, weekends, and on-call rotation.
3. How do you train a new maintenance technician in their first ninety days?
4. A technician’s work quality has been slipping for a month. What do you do,
and what do you write down?
(Good answer: talks to them early, sets a specific expectation, documents the
conversation, and follows up on a date.)
5. Production wants a machine to keep running past its service interval. How do
you handle that conversation?
6. A line is down and the owner is asking for an update every ten minutes. How
do you communicate during an outage?
7. What does your daily and weekly cadence with the crew look like?
8. Tell me about a technician you developed into a lead. What did you actually
do?
WHAT A STRONG ANSWER LOOKS LIKE
Look for concrete mechanics: a morning handoff, a written work order queue, a
posted on-call rotation, a training checklist. Strong supervisors describe the
production conversation as a negotiation with evidence, not as either caving or
digging in. The best answers show someone who documents performance
conversations as a matter of habit, because that habit protects you later.
NOTES
[Capture crew size managed, on-call structure, and documentation habits here.]
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Communication with operations Score: [ 1 2 3 4 5 ]
Evidence: __
Behavioral evidence (STAR) Score: [ 1 2 3 4 5 ]
Evidence: __
AUTOMATIC RED FLAGS (CHECK ANY THAT APPLY)
[ ] Cannot describe a lockout and tagout sequence including verification
[ ] Claims expertise in every trade with no specifics in any of them
[ ] Has no metric of any kind for planned versus reactive work
[ ] Blames operations or the previous supervisor for every example
[ ] Treats a near miss as a nonevent because nobody was hurt
[ ] Will not say which trades or systems they are weak in
[ ] No documentation habit for performance or training records
SUMMARY
Total score: ______ / 30
Overall recommendation: [ ] Strong yes [ ] Yes [ ] No [ ] Strong no
Key strengths: __
Key concerns: __
Reference check completed: [ ] Yes [ ] No
Interviewer signature: __
Note: If more than one person interviews, have each score independently before
anyone talks. Compare written evidence first, opinions second.
Judging Technical Depth Without Being a Technician
You do not have to grade the trade to run this interview well. You have to tell a specific answer from a confident one, and the difference is audible once you know the pattern. Strong answers name equipment and failure modes; weak answers name categories.
Walk me through how you would diagnose a motor that keeps tripping its breaker.
Strong answer: Checks the load and the driven equipment before condemning the motor, looks at bearings, alignment, insulation resistance, and supply voltage, and treats the trip as protection doing its job rather than a nuisance. A strong answer ends with the root cause, not a replacement part.
Weak answer: A weak answer jumps straight to replacing the motor or the breaker, or treats a repeated trip as a faulty breaker without asking why it is tripping.
How do you decide whether to repair something in house or call a licensed contractor?
Strong answer: Draws the line at license scope, permit requirements, warranty terms, and risk to people, not at pride or budget. A strong answer gives a concrete example of a job they handed off and says exactly why.
Weak answer: A weak answer says the crew can handle anything, or has no idea which work requires a licensed trade and a permit in your jurisdiction.
How would you build a preventive maintenance schedule for equipment that has never had one?
Strong answer: Starts from an equipment list ranked by criticality, pulls manufacturer intervals, sets a realistic first pass, then tunes the intervals using actual failure history. A strong answer admits the first schedule will be wrong and describes how they correct it.
Weak answer: A weak answer applies a generic monthly calendar to everything, or describes preventive maintenance as something the technicians do when they have spare time.
Two practical additions beat any question list. Walk the candidate through your actual equipment and ask what they would check first, because a real practitioner starts pointing at things within a minute. And have your most senior technician sit in on the technical set, then score it separately from you.
Ask
What a strong answer includes
Which trades are you strongest in?
Picks two or three and names the ones they are weak in
How do you diagnose a repeat breaker trip?
Works to root cause; does not swap parts until it stops
When do you call a licensed contractor?
Draws the line at license scope, permits, and risk
What licenses do you hold?
Knows exactly what each one lets them sign off on
Which CMMS have you used?
Names the system and the reports they actually open
Verify what you hear. Confirm licenses with the issuing board rather than accepting a photo of a card, and check EPA refrigerant certification if your site runs HVAC or process cooling. It is a short call that prevents a long problem.
Safety and Compliance Questions
Ask every candidate to walk the entire lockout and tagout sequence, and listen for the verification step. Identifying and isolating energy sources is the part most candidates can recite; confirming the equipment cannot start before anyone touches it is the part that separates a practitioner from a reciter.
Energy isolation
Identifies every energy source, not just electrical
Releases stored energy: springs, hydraulics, capacitors
Verifies the machine cannot start before work begins
Permits and hazard analysis
Runs a hazard analysis on nonroutine work
Knows confined space and hot work permit rules
Briefs the crew before the job, not after
Training records
Keeps certifications current and provable
Retrains after a procedure or equipment change
Can produce records without a scramble
Red flags
Skips the verification step in lockout and tagout
Calls a near miss a nonevent because nobody was hurt
Treats safety as paperwork rather than a sequence
Lockout and Tagout Sits in OSHA’s Most-Cited List
The control of hazardous energy standard, 29 CFR 1910.147, is on OSHA's list of most frequently cited standards for fiscal year 2025, and it is the one duty a maintenance supervisor owns for everybody else on the crew. Ask for the full sequence, including release of stored energy such as springs, hydraulics, capacitors, and suspended loads, and the verification that the machine cannot start.
Follow the lockout question with group lockout, permits, and incident response. A supervisor who calls a near miss a nonevent because nobody was hurt will run your site the same way, and that answer should cost real points on the scorecard.
The rest of the safety set is about proof. Ask how they keep certification records current and how fast they could produce them, and pair the answer with your own safety training obligations and your general OSHA requirements as an employer.
What to Probe For (and Red Flags)
The prepared questions get you started; the follow-ups decide the hire. Push for the specific number, the actual outcome, the real example. The single most useful follow-up in this interview is what changed afterward.
Planning signals
Knows the planned versus reactive split at their last site
Names real metrics such as backlog and downtime
Talks about intervals tuned by failure history
Technical signals
Names specific equipment and specific failure modes
Separates the symptom from the root cause
Says plainly where their license stops
Leadership signals
Describes a real handoff and work order queue
Documents performance conversations by habit
Negotiates with operations using evidence
Red flags
Expert in every trade, specific about none
No metric of any kind for planned work
Blames operations for every example given
Red flags cluster. A candidate with no planning metric usually also has no documentation habit, and a candidate who blames operations for every example usually has no example where they were wrong. Write the flags down as they appear rather than reconstructing them later.
How to Run the Interview
Run it in a fixed order and score it immediately. Structure is what makes a single owner's interview as rigorous as a hiring panel's, and it takes about ten minutes of preparation per candidate once the question set is chosen.
Step
What to do
1. Prepare
Pick questions from all five categories for your site and equipment
2. Standardize
Ask the same core questions of every candidate, in the same order
3. Press on planning
Test preventive maintenance, metrics, spares, and budget hard
4. Walk the safety sequence
Full lockout and tagout, including the verification step
5. Go behavioral
Ask for real past examples using the STAR pattern
6. Score and verify
Rubric with evidence, then licenses and reference checks
If you can, add a short site walk to the process. Twenty minutes on the floor with a candidate tells you more about how they see equipment than an hour across a table, and it is a fair test to give every finalist the same way.
Score right after each interview while the answers are fresh, using the same interview evaluation form for everyone. If two people interview, both score alone first, because the difference between structured and unstructured interviewing mostly shows up in whether anyone wrote anything down.
Fair, Legal, and Structured Interviewing
Asking the same job-related questions of every candidate is simultaneously the fairest, the most legally defensible, and the most accurate approach. The three goals do not trade off against each other, which is the part most hiring advice gets backwards.
Ask about the job, not the person
Federal anti-discrimination law, enforced by the EEOC, prohibits basing a hiring decision on protected characteristics, and questions that probe them create risk even when they are asked as small talk. Skip age, race, religion, national origin, sex, pregnancy or family plans, disability, and genetic information. Maintenance interviews have a specific trap: physical demands. Do not ask whether a candidate has a bad back, a prior injury, or a workers compensation history. You may describe the essential physical functions of the job, such as climbing ladders or lifting a stated weight, and ask whether the candidate can perform them with or without reasonable accommodation. Keep every other question tied to running a crew and maintaining equipment. This is general information, not legal advice.
Use the same core questions for every candidate
Asking each candidate the same core questions and scoring them against the same rubric is both fairer and more accurate. A structured interview predicts on-the-job performance far better than a free-flowing conversation, because it forces you to compare evidence instead of comparing how the conversation felt. For maintenance hiring this matters more than most roles, because candidates arrive from wildly different backgrounds: plant floor, facilities, property management, and the trades. The same question set is the only way to compare them honestly. Write the questions in advance, ask them in the same order, and score right after each interview while the answers are fresh.
Verify licenses and certifications before the offer
A maintenance supervisor who signs off on electrical, refrigerant, or boiler work usually needs a specific license, and the requirements are set at the state or local level rather than federally. Ask which licenses the candidate holds, what each one lets them sign off on, and when it expires. Then verify it with the issuing board rather than taking a photo of a card at face value. Do the same for EPA refrigerant certification if your site has HVAC or process cooling. This is a five minute check that prevents an expensive problem, and a candidate who is vague about the scope of their own license has told you something worth writing down.
Score independently, then discuss
When the owner and a lead technician both interview, have each of them fill in the scorecard alone before the two of them talk. Otherwise whoever speaks first anchors the decision, and at a small business that is usually the owner. Compare the written evidence line by line, then discuss where the scores diverge, because the disagreements are where the useful information lives. A 1 to 5 rubric per competency, filled in independently, turns an argument about a feeling into a structured decision you can defend to yourself six months later.
Same Questions, Same Rubric, Better Hires
A structured interview, where every candidate answers the same questions scored against a consistent rubric, predicts on-the-job performance more reliably than a free-flowing conversation, and asking the same job-related questions of everyone also keeps you within the EEOC's rules against basing decisions on protected characteristics. For maintenance roles the specific trap is physical demands: describe the essential functions, then ask whether the candidate can perform them with or without reasonable accommodation.
Keep the small talk on the job too. Questions about family, origin, age, or a past injury are exactly the ones people ask without thinking, and they are the ones that create risk. For the full list, see illegal interview questions and how to reduce bias in hiring. This is general information, not legal advice.
Maintenance Supervisor Pay and Exempt Status
Benchmark pay before the first interview so you can talk about it honestly, and settle the exempt question separately, because the job title never decides it. Both conversations go better when you have the numbers in front of you.
Median $79,860 a Year (BLS OEWS, May 2025)
First-line supervisors of mechanics, installers, and repairers had a median annual wage of $79,860, about $38.39 an hour, with the lowest 10 percent near $49,600 and the highest 10 percent near $126,790 (Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025). The occupation held roughly 617,500 jobs in 2024, with about 52,400 openings projected annually.
The spread from $49,600 to $126,790 is the whole story: industry, site complexity, crew size, on-call load, and license requirements move the number far more than the national midpoint suggests. Pay a premium for an electrical or boiler license and for genuine 24 hour on-call responsibility.
On classification, the Fair Labor Standards Act executive exemption requires a salary basis of at least $684 per week ($35,568 a year), management as the primary duty, customary direction of at least two full-time employees, and real weight in hiring decisions. A working supervisor who spends most of the week on tools often fails the primary duty test, so classify on the actual duties and pay overtime when the role is really hands-on work with a title attached.
Hiring a Maintenance Supervisor Without HR
At a plant with an engineering department, this candidate faces a panel of people who can grade every answer. At a small business the owner runs the interview alone, between everything else, and the most common version of this hire is a promotion nobody interviewed properly. Here is how to close that gap.
You are hiring a maintenance supervisor without being a maintenance expert
At a plant with an engineering department, a maintenance supervisor is interviewed by people who can grade the answers. At a small business the owner or the operations lead usually runs the interview alone, and often cannot tell a genuinely deep technical answer from a confident one. That is why every core question in these sets carries a note on what a good answer sounds like. You are not grading the trade. You are listening for specificity, for a clean separation between symptom and root cause, and for honesty about where the candidate’s skill and license stop. Vague confidence is the pattern to distrust, and it is easy to hear once you know to listen for it.
Your best technician is not automatically your best supervisor
The most common small business maintenance hire is a promotion: the strongest technician gets the title. It fails often, because the supervisor job is planning, scheduling, safety ownership, and difficult conversations, and none of those are what made the person a good technician. If you are promoting from inside, interview them properly against the same question sets, and weight the preventive maintenance and leadership categories heavily. If the answers there are thin but the technical answers are strong, you have learned something useful: the person may need a lead technician role and a real training plan rather than a supervisor title they will struggle in.
The interview ends and the real work starts
Once you choose someone, the job changes from evaluating to hiring well: a written offer, the new hire paperwork, license and certification records on file, safety training acknowledged in writing, and a structured first ninety days so the new supervisor gets the schedule under control before the next breakdown. FirstHR covers that people side for a small business: send the offer for e-signature, run the onboarding workflow and task list, assign safety and policy training modules, and keep the signed documents and certification copies on the employee profile where you can actually find them. FirstHR is an onboarding and HR platform, not a maintenance management system, so pair it with your CMMS. Applicant tracking is coming soon to FirstHR.
One caveat while you are running several openings at once: keep the completed scorecards somewhere better than a folder on one laptop, because at three candidates it is fine and at fifteen it is not. Applicant tracking is coming soon to FirstHR, and until then a shared drive with one file per candidate beats memory every time.
From Interview to Hire
Once you choose someone, the work shifts from evaluating to hiring well: a written offer letter that spells out on-call expectations, license and certification copies on file, safety training acknowledged in writing, and a structured first ninety days with a real target for getting the schedule under control.
Run the same question set
Pick the categories that fit your site and ask every candidate the same core questions, in the same order, so the comparison is honest.
Score and check references
Fill in the 1 to 5 rubric immediately after each interview, verify licenses with the issuing board, and ask references about safety judgment.
Send the offer in writing
Confirm the role, pay, on-call expectations, and start date in writing, with e-signature so you have a clean record of what was agreed.
Onboard for the first ninety days
Site orientation, safety training acknowledged in writing, systems access, and a clear target for getting the PM schedule under control.
Be specific about that ninety day target. A new maintenance supervisor who is handed a backlog and no mandate will spend a year firefighting, so agree in the first week on what planned work should look like by day ninety and how you will both measure it.
FirstHR connects the offer, e-signature, new hire paperwork, onboarding tasks, and training modules in one place, and keeps the signed documents and certification copies on the employee profile where you can actually find them during an inspection. FirstHR is an onboarding and HR platform, not a maintenance management system or a work order tool, so pair it with your CMMS. Applicant tracking is coming soon to FirstHR.
Assess a maintenance supervisor on planning and safety ownership at least as hard as on wrench skill, because those are the duties a promoted technician has never performed.
Press the preventive maintenance set hardest: a candidate with no metric for planned versus reactive work is telling you they have never run a schedule.
Ask every candidate to walk the full lockout and tagout sequence and listen for the verification step before anyone touches the equipment.
Judge technical depth by specificity, not confidence: strong answers name equipment and failure modes and admit where the license stops.
Describe essential physical functions rather than asking about injuries, and keep every question job-related and identical across candidates.
Score each competency 1 to 5 with a line of written evidence, independently, and verify licenses with the issuing board before the offer.
Frequently Asked Questions
What questions should I ask a maintenance supervisor candidate?
Ask across five areas: technical and trade depth, preventive maintenance and planning, safety and compliance, crew leadership and scheduling, and behavioral evidence from real past situations. Strong core questions include which trades they are strongest and weakest in, how they would diagnose a motor that keeps tripping its breaker, how they would build a preventive maintenance schedule for equipment that has never had one, which maintenance metrics they track and why, how they run lockout and tagout from start to finish, how they cover nights and on-call, and a time a breakdown cost the business real money. Ask every candidate the same core set and score it, because maintenance candidates arrive from very different backgrounds and only a consistent question set lets you compare them honestly. This page includes six downloadable sets plus a scorecard.
What makes a good maintenance supervisor?
A good maintenance supervisor is defined more by planning and safety ownership than by raw wrench skill. The three qualities that matter most are technical judgment, which is the ability to separate a symptom from a root cause and to know where their own license stops; planning discipline, meaning they can build and defend a preventive maintenance schedule, track downtime and backlog, and shift a site away from constant reactive repairs; and crew leadership, meaning they can assign work across mixed skill levels, cover on-call fairly, train new technicians, and hold a hard conversation in writing. Safety ownership runs through all three. A brilliant technician who has never planned a schedule or documented a performance conversation is a common and expensive hiring mistake at this level.
How do I test technical skill if I am not a maintenance expert?
You do not need to grade the trade. You need to recognize a specific answer from a confident one. Every core question in this kit comes with a note on what a strong answer sounds like, and the patterns are consistent. Strong candidates name specific equipment and specific failure modes, work from symptom to root cause rather than swapping parts, and say plainly which trades they are weak in and where their license ends. Weak candidates claim expertise in everything and give detail on nothing. Two practical additions help: walk the candidate through your actual equipment and ask what they would check first, and have your most senior technician sit in on the technical set. Then verify licenses with the issuing board rather than accepting a card at face value.
What safety questions should I ask a maintenance supervisor?
Start with lockout and tagout and ask them to walk the whole sequence, not summarize it. The signal to listen for is verification: a real practitioner identifies every energy source, isolates and locks it, releases stored energy such as springs, hydraulics, capacitors, and suspended loads, then confirms the equipment cannot start before anyone puts hands on it. Follow with group lockout for multiple workers, hazard analysis on nonroutine jobs, confined space and hot work permits, how they respond to a near miss, how they keep crew training records provable, and how they control outside contractors on site. The control of hazardous energy standard, 29 CFR 1910.147, is on OSHA's list of most frequently cited standards, which makes this the single most important set on the page. This is general information, not legal advice.
Is a maintenance supervisor exempt from overtime?
Not automatically, and the job title alone never decides it. Under the Fair Labor Standards Act executive exemption, an employee must be paid on a salary basis of at least the standard salary level, currently $684 per week or $35,568 per year, have management as their primary duty, customarily and regularly direct the work of at least two full-time employees, and have real weight in hiring and firing decisions. Many small business maintenance supervisors are working supervisors who spend most of their time on tools, which can mean management is not their primary duty and the exemption does not apply. Classify based on the actual duties, not the title, and if the role is genuinely mostly hands-on work, treat it as nonexempt and pay overtime. This is general information, not legal advice; check with a qualified advisor for your situation.
How much does a maintenance supervisor make?
According to the Bureau of Labor Statistics Occupational Employment and Wage Statistics survey (May 2025), first-line supervisors of mechanics, installers, and repairers had a median annual wage of $79,860, which is about $38.39 per hour. The spread is wide: the lowest 10 percent earned about $49,600 and the highest 10 percent about $126,790, with the 25th percentile near $62,690 and the 75th near $101,360. That range reflects real differences in industry, site complexity, crew size, shift and on-call demands, and region, so benchmark to your local market rather than to the national midpoint. The occupation held roughly 617,500 jobs in 2024 with about 52,400 openings projected each year. Pay a premium if the role carries an electrical or boiler license and 24 hour on-call responsibility.
What are red flags in a maintenance supervisor interview?
The clearest red flag is a candidate who cannot walk a lockout and tagout sequence including the verification step, because that is the core safety duty of the job. Close behind: claiming expertise in every trade while giving specifics in none, having no metric of any kind for planned versus reactive work, treating a near miss as a nonevent because nobody got hurt, refusing to name a trade or system they are weak in, blaming operations or the previous supervisor for every example, and having no habit of documenting performance conversations or training records. Also watch for candidates who describe preventive maintenance as something technicians do when they have spare time. The downloadable scorecard on this page includes this list as an automatic red flag checklist so it stays in front of you during the interview.
What questions are illegal to ask in a maintenance supervisor interview?
Avoid anything that probes characteristics protected under federal law, which the EEOC enforces: age, race, color, religion, national origin, sex, pregnancy or family plans, disability, and genetic information. Maintenance interviews carry one specific trap, which is physical demands. Do not ask whether a candidate has a bad back, a prior injury, or a workers compensation history. You may describe the essential physical functions of the job, such as climbing ladders or lifting a stated weight, and ask whether the person can perform them with or without reasonable accommodation. You may also ask whether they are legally authorized to work and whether they hold the licenses the role requires. Keep every other question tied to maintaining equipment and running a crew, and ask the same questions of everyone. This is general information, not legal advice.
