Janitor Interview Questions
A janitor interview usually gets spent on reliability and attitude, which are real but unmeasurable in twenty minutes. The things you can actually establish are narrower and more useful: whether the person has worked alone at night, what they do when a chemical is not labelled, how they handle a mess involving blood or bodily fluids, and how many square feet they have genuinely covered on a shift. Two of those four are also legal questions — OSHA requires you to train on chemicals at initial assignment, and where there is occupational exposure to blood it requires a vaccine offer within ten working days. Knowing that changes what you ask and what you promise.
What this page covers
Questions to ask a janitor or cleaner, what a strong answer contains, and which answers sound like problems and are not. It assumes you are hiring for commercial cleaning, schools, healthcare, industrial or building services, and that you already have a written cleaning role job description. The general employer-side interview method — structure, scoring anchors, the screener handoff — lives on our interview questions to ask candidates guide, and this page does not repeat it.
We are a recruitment advertising company, so our measured data covers what it costs to get a cleaner to complete an application, not what happens in the interview. Everything here about the interview itself is a working pattern. Everything about the federal rules is quoted from OSHA with the paragraph number attached, and none of it is legal advice.
Two obligations that start on day one, not day thirty
These are not candidate requirements. They are things you owe the person, and getting them straight before the interview means you can answer the questions an experienced cleaner will ask.
The standard is explicit about timing: “employers shall provide employees with effective information and training on hazardous chemicals in their work area at the time of their initial assignment” (1910.1200(h)(1)). Alongside it sits the written programme — “employers shall develop, implement, and maintain at each workplace, a written hazard communication program” (1910.1200(e)(1)) — and the requirement that safety data sheets be kept in the workplace and “readily accessible during each work shift to employees” (1910.1200(g)(8)). Containers must be “labeled, tagged or marked” (1910.1200(f)(6)), which is exactly the thing that goes wrong when someone decants a concentrate into an unmarked spray bottle.
If the role involves blood or bodily fluids, a second standard applies
The bloodborne pathogens standard covers anyone with occupational exposure, defined as “reasonably anticipated skin, eye, mucous membrane, or parenteral contact with blood or other potentially infectious materials that may result from the performance of an employee's duties.” Cleaning restrooms in an office generally is not that; cleaning a healthcare facility, a school nurse's room, or handling sharps very likely is. Where it applies, the employer must provide personal protective equipment “at no cost to the employee” (1910.1030(d)(3)(i)); provide training “at the time of initial assignment to tasks where occupational exposure may take place” and “at least annually thereafter” (1910.1030(g)(2)(ii)(A)–(B)); and make hepatitis B vaccination available “within 10 working days of initial assignment” (1910.1030(f)(2)(i)), with all such medical evaluations and procedures “made available at no cost to the employee” (1910.1030(f)(1)(ii)(A)). Decide before the interview whether your role is in scope, because a candidate who has worked in healthcare will ask.
Source: OSHA, 29 CFR 1910.1200 and 29 CFR 1910.1030, read at source 8 September 2026. Federal requirements only; state plans may impose more. Not legal advice.
Eight questions worth the time
Ask these of every candidate, in this order. The first four are about the work as it actually happens; the last four are about whether the job you have is the job they want.
1. “What building were you cleaning last, and roughly how big was your area on a shift?”
Square footage and building type do more work than years of experience. A person who has covered 40,000 square feet of office on a five-hour shift and a person who has done four classrooms are both cleaners, and they are not the same hire.
A strong answer has a number or a describable route in it: three floors, this many restrooms, trash and vacuum nightly, floors on Fridays.
Not a red flag: not knowing the square footage. Ask what was on the route instead; almost everyone can describe the route.
2. “You find a spray bottle with no label. What do you do?”
The single most informative safety question you can ask a cleaner, and the answer is diagnostic in both directions. It also tells you what their last employer was like.
A strong answer is: do not use it, do not smell it, tell a supervisor, and either label it or dispose of it properly. Bonus if they mention the safety data sheet.
A genuine flag: “I would just use it, you can usually tell.” That is the answer that ends with somebody mixing bleach and ammonia.
3. “Talk me through cleaning up a mess involving blood or vomit.”
Applies in schools, healthcare, gyms, transport and any public building. You are checking for a method and for whether they know it is a different category of task.
A strong answer mentions gloves and other PPE, isolating the area, a disinfectant appropriate to the job, and how the waste was disposed of. Someone trained under the bloodborne pathogens standard will often say so.
Not a red flag: never having done it. Say whether your role includes it, and if it does, say what training and PPE you provide — because you are required to provide both.
4. “What is the first thing you do when you get to the building, and the last thing before you leave?”
Cleaners who work unsupervised run on routine, and a described routine is the best available evidence that one exists. It also surfaces the security and lock-up habits that matter when nobody else is in the building.
A strong answer is sequential and includes both the work and the building: check the log, start on the far floor, work back toward the door, take out the trash last, set the alarm, lock up.
Not a red flag: a routine that differs from yours. You are testing for the existence of a system, not for a match with your system.
5. “Have you worked alone at night? How did you find it?”
Most janitorial work is solitary and after hours, and it is the most common reason a good cleaner quits a job they were good at. Ask it plainly rather than discovering it in week three.
A strong answer is honest either way. Someone who says they prefer working alone is telling you something useful; so is someone who says they would rather be on a two-person crew.
A caution: keep this about the work pattern. Do not follow it into family circumstances, transport difficulties or health — those are not yours to weigh before an offer.
6. “What equipment have you actually used?”
Ride-on scrubber, walk-behind, burnisher, extractor, backpack vacuum, floor buffer. Machine experience is the closest thing this occupation has to a credential, and it is worth pay.
A strong answer names machines and says which they are confident on. Someone who has stripped and waxed a floor unsupervised is a different hire from someone who has vacuumed.
Not a red flag: no machine experience. The occupation is entered with short-term on-the-job training and no formal credential. If you can train, this is a normal hire.
7. “Which shifts do you actually want, not which ones would you take?”
Second and third shift, split shifts, weekend-only. People take schedules they do not want and leave. This wording gives permission for the true answer.
A strong answer is narrow and reasoned: a bus that stops at eleven, a second job, school pickup. Reasons are what let you build a rota that holds.
Not a red flag: wanting more hours than you have. That is a person telling you they will take the extra building when it comes up.
8. “What would have to be true for you to still be here next summer?”
The retention question. In an occupation with 321,800 openings a year, mostly replacement, this is the highest-return thirty seconds in the interview.
A strong answer names something you control: consistent hours, the same building, supplies that actually arrive, a supervisor who answers the phone at eleven at night.
Not a red flag: pay. With a median of $36,840 it is a reasonable first answer. The follow-up is what a good week needs to come to.
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Answers that sound like problems and are not
A gap in the work history. Janitorial contracts end when the building changes hands or the contract is re-bid, and everyone on the crew goes at once. It is often the contract, not the person. Ask what happened before you count it.
“I have only cleaned houses.” Residential to commercial is a real transition — different chemicals, different pace, different machines — but it is a training gap, not a character one, in an occupation whose typical preparation is short-term on-the-job training.
Limited English. Ask what the job actually requires. If the requirement is reading a chemical label and a work order, test that rather than testing conversation, and remember that you are separately required to make hazard communication training effective for the employee receiving it.
“I would call my supervisor.” For an unlabelled chemical, a biohazard or a locked area that should not be locked, that is the correct answer, not a lack of initiative.
Asking about supplies in the interview. A cleaner who asks whether the stockroom is kept full has worked somewhere it was not. That question is experience, not attitude.
The market you are interviewing in
This is one of the largest occupations in the country and one of the highest-churn.
The Bureau of Labor Statistics projects janitors and cleaners to go from about 2.43 million jobs in 2025 to 2.49 million in 2035, growth of 2.2% against 3.5% for all occupations, with an average of 321,800 openings a year once replacements are counted. The median annual wage is $36,840 and no formal educational credential is typically required to enter.
The practical consequence is that you are not competing for a scarce skill; you are competing on the ordinary conditions of the job. Whether the supplies arrive, whether the route is the size it was described as, and whether somebody answers the phone at eleven at night decide more of your retention than anything asked in the interview.
Source: U.S. Bureau of Labor Statistics, Employment Projections program, National Employment Matrix, occupational projections and worker characteristics table, 2025–35, SOC 37-2011. Read at source 8 September 2026.
What this role commits you to
Set the building and the tasks and see which obligations attach, and what to say about them in the interview.
Role obligation and disclosure check
What to say before they leave the room
A cleaner with options is deciding about you too, and the deciding factors are almost entirely concrete.
Say the route honestly. The building, the square footage, how many restrooms, what is nightly and what is weekly. Every cleaner has been given a route that was described as half its real size.
Say who they can reach at 11pm. Lone night work with nobody answering the phone is the reason a lot of good cleaners leave. If you have a real answer, it is a strong one.
Say what you supply and how often. Chemicals, machines, PPE, and what happens when the stockroom runs out.
Say what training they get and when. If you are doing hazard communication training at initial assignment, which you are required to, say so — it distinguishes you from employers who do not.
Say when you will decide, then do it. In an occupation with this much churn, a same-week decision beats a better-worded one.
What we cannot tell you
We do not have interview-to-hire conversion data for janitorial roles and we are not going to invent it. What we can see is the stage before: what it costs to get a cleaner to finish an application, and how that moves with the shift, the stated pay and the length of the form. The interview patterns here are working practice from employers we advertise for, labelled as such deliberately.
If the interviews are good and the calendar is empty, the problem is upstream. Our guide to the best way to recruit covers that half.
Frequently asked questions
What questions should you ask in a janitor interview?
Ask what building they cleaned last and how big the route was, what they would do with an unlabelled spray bottle, how they would handle a spill involving blood or vomit, what their first and last task of a shift are, whether they have worked alone at night and how they found it, which machines they have actually used, which shifts they genuinely want, and what would have to be true for them to still be there next summer. The unlabelled bottle question is the most diagnostic of the eight.
What training must an employer give a janitor?
Under OSHA's hazard communication standard, employers must provide effective information and training on the hazardous chemicals in the employee's work area at the time of their initial assignment, maintain a written hazard communication program at each workplace, keep safety data sheets readily accessible during each work shift, and ensure workplace containers are labelled. Where there is reasonably anticipated contact with blood or other potentially infectious materials, bloodborne pathogens training is required at initial assignment and at least annually thereafter.
Do janitors need a hepatitis B vaccination?
Only where the role involves occupational exposure as the bloodborne pathogens standard defines it — reasonably anticipated skin, eye, mucous membrane or parenteral contact with blood or other potentially infectious materials. Where it applies, the employer must make hepatitis B vaccination available within 10 working days of initial assignment, and all such medical evaluations and procedures must be made available at no cost to the employee. Whether a cleaning role is in scope depends on the setting and the tasks, and is worth settling before you advertise.
What experience should a janitor have?
The occupation typically requires no formal educational credential and is learned through short-term on-the-job training, so experience is useful rather than necessary. What is worth asking about specifically is route size and machine experience: someone who has stripped and waxed a floor or run a ride-on scrubber unsupervised is a materially different hire from someone who has vacuumed, and that difference is usually worth paying for.
What should you not ask a janitor in an interview?
Anything about the person rather than the job. Age, health, disability, family or childcare arrangements, and immigration status are all outside what may be asked before an offer. Availability for a night shift is a job question and may be asked; why someone is unavailable is not. If a candidate volunteers personal circumstances while answering about lone night work, do not follow the thread.
How do you reduce janitorial turnover?
Mostly by fixing the conditions rather than the hiring. Describe the route accurately at interview so nobody arrives to twice the work they expected, keep supplies stocked, give lone night workers somebody who actually answers the phone, and act on whatever the candidate named when asked what would keep them. With around 321,800 openings a year in the occupation, nearly all of it replacement, retention is where the leverage sits.
How many janitors should you interview per hire?
Fewer than most employers plan for, and faster. Candidates in this occupation typically hold more than one live option and a process spread over two weeks loses to one that decides in the same week. A single structured interview with a scorecard, plus a walk of the actual building where practical, is usually enough. Showing the building is also the cheapest way to prevent a first-week resignation.
Getting janitorial candidates to the interview in the first place
If the interview process is good and the calendar is empty, the problem is upstream. That part we measure.
Hazard communication requirements quoted from OSHA 29 CFR 1910.1200, read at source 8 September 2026: (h)(1) on information and training at the time of initial assignment; (e)(1) on the written hazard communication program; (g)(8) on safety data sheets being readily accessible during each work shift; (f)(6) on workplace container labelling. Bloodborne pathogens requirements quoted from 29 CFR 1910.1030, read at source 8 September 2026: the definition of occupational exposure; (f)(1)(ii)(A) on medical evaluations and the hepatitis B vaccine being made available at no cost to the employee; (f)(2)(i) on the vaccination being made available within 10 working days of initial assignment; (g)(2)(ii)(A) and (B) on training at the time of initial assignment and at least annually thereafter; (d)(3)(i) on personal protective equipment being provided at no cost where there is occupational exposure. Federal requirements only; state plans may impose more, and nothing here is legal advice. Labour market figures: U.S. Bureau of Labor Statistics, Employment Projections program, National Employment Matrix, occupational projections and worker characteristics, 2025–35, SOC 37-2011, read at source 8 September 2026. Interview patterns on this page are working practice from employers we advertise for, not measured results, and are labelled as such.