Custodian Interview Questions
Prepare for your Custodian interview. Understand the required skills and qualifications, anticipate the questions you may be asked, and study well-prepared answers using our sample responses.
Interview Questions for Custodian
Walk me through your process for cleaning and sanitizing restrooms during a busy workday.
Tell me about a time when you had to juggle multiple urgent cleaning requests at once. How did you prioritize?
How do you handle and store cleaning chemicals to keep yourself and others safe?
Scenario: There’s a large coffee spill near electrical equipment in an open office. What’s your immediate response?
What’s your experience with floor care equipment and different floor types?
In startups, layouts and headcount can change quickly. How have you adapted your routines when things shifted suddenly?
How do you manage cleaning supplies and inventory when budgets are tight?
What’s your approach to cleaning around people without disrupting their work?
If you were asked to design a daily and weekly cleaning schedule for a 15,000 sq ft office growing from 50 to 150 people, how would you build it?
Why are you interested in being the founding custodian at our startup?
Share an example of how you helped build a safety-first or cleanliness-focused culture on your team.
How do you ensure kitchens and restrooms consistently meet hygiene standards?
Describe a time you noticed a facility issue outside your normal duties and took ownership to resolve it.
What steps do you take to protect confidentiality and sensitive information you might see while cleaning?
How do you stay current with cleaning best practices, equipment, and safety standards?
If a key supply delivery was delayed and you were running low, how would you keep operations going?
What is your protocol for handling biohazard incidents such as blood or vomit in the workplace?
Tell us about your experience with recycling, compost, and waste management programs.
A team just booked a last-minute event after hours. How would you support setup, cleaning during the event, and a quick turnaround for the next morning?
What system do you prefer for documenting tasks, inspections, and reporting issues?
Describe a time you collaborated with facilities, HR, or IT to get something done in a small team.
When schedules are tight, how do you balance speed with quality so standards don’t slip?
What motivates you about custodial work, and how do you see your growth over the next few years?
If you joined us, what would your first 30 days look like to make an immediate impact?
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Walk me through your process for cleaning and sanitizing restrooms during a busy workday.
Employers ask this question to gauge your technical process, attention to detail, and understanding of hygiene standards. In your answer, describe your step-by-step workflow, products used, safety measures, and how you minimize disruption during peak hours.
Answer Example: "I start with PPE and signage, then remove trash and restock supplies. I clean high-touch surfaces first (dispensers, door handles), followed by fixtures, mirrors, and partitions, then floors, using color-coded cloths to avoid cross-contamination. I use EPA-registered disinfectants and respect dwell times. During peak hours, I do quick touch-ups and restocks, scheduling deep cleans for low-traffic times."
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Tell me about a time when you had to juggle multiple urgent cleaning requests at once. How did you prioritize?
Employers ask this to see how you handle pressure and make sound decisions. In your answer, explain your triage approach, communication with stakeholders, and how you ensured safety and quality didn’t slip.
Answer Example: "At my last job, I had a restroom overflow, a spill in the kitchen, and a conference room turnaround all at once. I handled the restroom overflow first due to safety, set caution signs, and called maintenance while I contained it. I then delegated the conference room wipe-down to a teammate and immediately addressed the kitchen spill to prevent slips. I kept requesters updated so expectations were clear."
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How do you handle and store cleaning chemicals to keep yourself and others safe?
Employers ask to confirm you know OSHA requirements and proper chemical handling. In your answer, mention SDS access, labeling, dilution control, PPE, and storage procedures that prevent accidents.
Answer Example: "I follow OSHA and manufacturer guidelines, keep all SDS accessible, and ensure secondary containers are labeled correctly. I use dilution control systems for concentrates, wear appropriate PPE, and never mix chemicals like bleach and ammonia. Chemicals are stored in ventilated, secured areas away from food. I also train others on safe handling and spill response protocols."
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Scenario: There’s a large coffee spill near electrical equipment in an open office. What’s your immediate response?
Employers want to hear your hazard awareness and practical steps for a safe, efficient cleanup. In your answer, address making the area safe, communicating with nearby staff, and using the right tools without risking equipment.
Answer Example: "I’d cordon off the area with wet floor signs and notify nearby staff and IT to prevent equipment damage. I’d unplug any devices if safe, use absorbent pads to contain the spill, then clean with a neutral cleaner and dry the area thoroughly. I’d check cables and power strips for moisture and report any concerns. Finally, I’d document the incident and reopen the space once safe."
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What’s your experience with floor care equipment and different floor types?
Employers ask this to assess hands-on skills with tools like auto-scrubbers and buffers, and your knowledge of floor materials. In your answer, share specific equipment you’ve used, floor types, and maintenance routines.
Answer Example: "I’ve operated auto-scrubbers, burnishers, and low-speed buffers, and I’m comfortable with daily, periodic, and restorative care. I’ve maintained LVT, sealed concrete, tile/grout, and carpet, adjusting pads, brushes, and chemicals accordingly. For carpets, I use spot extraction and interim encapsulation; for hard floors, I stick to neutral cleaners and proper finish maintenance. I always test products in a small area first."
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In startups, layouts and headcount can change quickly. How have you adapted your routines when things shifted suddenly?
Employers ask to see flexibility and a proactive mindset in dynamic environments. In your answer, show how you re-map routes, adjust frequencies, and communicate changes without losing quality.
Answer Example: "When my previous company doubled headcount on one floor, I re-zoned the space and moved high-touch disinfection to twice daily in hot spots like kitchens and phone booths. I created a quick reference map, updated checklists, and staggered tasks to avoid rush hours. I met with the office manager weekly to refine priorities. The result was fewer complaints despite the growth."
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How do you manage cleaning supplies and inventory when budgets are tight?
Employers ask this to understand your resourcefulness and cost control. In your answer, discuss par levels, tracking usage, alternative products, and preventing waste without sacrificing cleanliness.
Answer Example: "I set par levels for each area, track weekly usage, and reorder based on lead times. I favor concentrated, multi-surface products and reusable microfiber to stretch budgets. I audit dispensers to reduce overuse and standardize SKUs to buy in bulk. If needed, I propose substitutions that maintain efficacy and safety while lowering cost."
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What’s your approach to cleaning around people without disrupting their work?
Employers ask to gauge your customer service and communication skills. In your answer, highlight scheduling around peak times, clear communication, and quiet, efficient methods.
Answer Example: "I plan vacuuming and floor work during off-peak hours and use quieter equipment where possible. I announce myself when entering meeting rooms, ask if it’s a good time, and work from least disruptive tasks to most. If someone’s on a call, I’ll circle back later. I also post daily cleaning windows so teams can plan."
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If you were asked to design a daily and weekly cleaning schedule for a 15,000 sq ft office growing from 50 to 150 people, how would you build it?
Employers ask this to assess your planning skills and ability to scale processes. In your answer, outline zoning, task frequencies, staffing assumptions, and how you’d measure quality and adjust as headcount grows.
Answer Example: "I’d divide the office into zones with task lists and frequencies: daily (trash, restrooms, kitchens, high-touch), weekly (dusting, glass, detailed floor edges), and monthly (vents, baseboards). I’d estimate time per task, build a route by traffic patterns, and include buffers for emergencies. I’d track results via checklists and periodic inspections, then increase frequencies and staffing as utilization and complaint data indicate."
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Why are you interested in being the founding custodian at our startup?
Employers ask to confirm motivation and culture fit for an early-stage environment. In your answer, connect your pride in ownership with building systems from scratch and supporting a fast-moving team.
Answer Example: "I enjoy creating order and hygiene that help people do their best work, and a startup lets me build the program the right way from day one. I like taking ownership—setting standards, routes, and safety practices—and iterating as the company grows. I’m energized by being a go-to person who keeps the space running smoothly."
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Share an example of how you helped build a safety-first or cleanliness-focused culture on your team.
Employers ask this to see how you influence culture beyond your individual tasks. In your answer, show a concrete initiative, communication approach, and measurable outcome.
Answer Example: "At my last company, I started a weekly 5-minute huddle to review one safety or cleanliness tip and a recent near-miss. I posted simple signage about spill reporting and proper waste sorting. Over three months, slip incidents dropped to zero and contamination in recycling decreased noticeably. It also made the team more comfortable flagging issues early."
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How do you ensure kitchens and restrooms consistently meet hygiene standards?
Employers ask to confirm you use standards and quality checks, not just effort. In your answer, mention checklists, dwell times, spot inspections, and how you handle feedback.
Answer Example: "I use detailed checklists by room with clear frequencies and products, and I build in dwell times for disinfectants. I do start-of-shift and end-of-shift inspections and keep a log. I also place QR codes for staff to report issues, and I address feedback the same day. Trends guide where I increase frequency or retrain."
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Describe a time you noticed a facility issue outside your normal duties and took ownership to resolve it.
Employers ask to see initiative and ownership, especially important in small teams. In your answer, show how you identified the issue, communicated, and coordinated a fix.
Answer Example: "I spotted a slow leak under a kitchen sink that was warping the cabinet base. I shut off the valve, set out a wet floor sign, and notified facilities with photos and a work order. I dried the area, monitored for moisture, and coordinated the plumber’s access. Catching it early prevented mold and a bigger repair."
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What steps do you take to protect confidentiality and sensitive information you might see while cleaning?
Employers ask this to ensure trust and professionalism around sensitive areas. In your answer, reference policies, discretion, and access procedures.
Answer Example: "I follow access lists, lock doors behind me, and never access devices or documents. If I see sensitive materials, I leave them untouched and work around them. I don’t discuss what I see and I report any security concerns to the appropriate contact. I also respect badge protocols and camera-free zones."
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How do you stay current with cleaning best practices, equipment, and safety standards?
Employers ask to see commitment to learning and continuous improvement. In your answer, mention trainings, certifications, and how you bring new ideas to the job.
Answer Example: "I complete annual OSHA and bloodborne pathogen training and follow ISSA resources and webinars. I meet with vendors to test new microfiber and low-VOC products, and I read product SDS updates. When I find a better method—like switching to electrostatic disinfection in flu season—I pilot it and share results with the team."
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If a key supply delivery was delayed and you were running low, how would you keep operations going?
Employers ask to assess resourcefulness and communication under constraints. In your answer, discuss rationing, substitutions that maintain standards, and stakeholder updates.
Answer Example: "I’d audit remaining stock, prioritize critical areas like restrooms, and implement controlled dispensing to reduce waste. I’d use safe substitutes, such as a neutral cleaner with proper microfiber for some tasks, while preserving disinfectants for high-touch surfaces. I’d call the vendor for an ETA, check local suppliers, and update the office manager on the plan until restocked."
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What is your protocol for handling biohazard incidents such as blood or vomit in the workplace?
Employers ask to verify you know procedures that protect health and comply with regulations. In your answer, mention training, PPE, containment, disinfectants, and disposal steps.
Answer Example: "I’m trained in bloodborne pathogen procedures and use full PPE, including gloves, mask, and eye protection. I cordon off the area, use absorbent materials, then clean and disinfect with an EPA-registered product rated for biohazards, observing dwell times. I double-bag waste in red bags for proper disposal and document the incident. I also ventilate the area and notify the appropriate contact."
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Tell us about your experience with recycling, compost, and waste management programs.
Employers ask this to see if you can support sustainability goals while keeping spaces clean. In your answer, cover stream setup, contamination reduction, and vendor coordination.
Answer Example: "I’ve helped set up clearly labeled stations for landfill, recycling, and compost with simple visual guides. I train staff on what goes where, adjust bin placement to reduce contamination, and track volumes with the hauler. I schedule line-cleaning of bins and handle bulky item pickups. Contamination rates dropped after we refreshed signage and training."
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A team just booked a last-minute event after hours. How would you support setup, cleaning during the event, and a quick turnaround for the next morning?
Employers ask to understand your flexibility and event support skills. In your answer, show planning, communication, and fast execution.
Answer Example: "I’d confirm the headcount and layout, set up waste stations, and stock restrooms beforehand. During the event, I’d do light sweeps for spills and trash to keep areas safe. Afterward, I’d prioritize high-traffic floors, kitchen, and restrooms, and run a quick inspection so the space is ready by morning. I’d coordinate with the organizer to align on any special requests."
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What system do you prefer for documenting tasks, inspections, and reporting issues?
Employers ask this to see how you create accountability and visibility. In your answer, mention tools you’ve used and how documentation improves quality and communication.
Answer Example: "I’ve used CMMS tools and simple digital checklists with time stamps and photos. I document completed tasks, note issues with priority levels, and attach images for clarity. This helps spot trends, support budgets, and keeps everyone aligned. If a tool isn’t in place, I can start with shared sheets and QR codes for quick reporting."
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Describe a time you collaborated with facilities, HR, or IT to get something done in a small team.
Employers ask to see cross-functional teamwork and communication. In your answer, highlight coordination, clear roles, and the outcome.
Answer Example: "We needed to reconfigure desks for a team move over a weekend. I coordinated with IT on equipment disconnects and with HR on seating charts, then handled protective floor coverings, cleanup, and waste removal. We finished early, and Monday morning the area was clean, labeled, and ready. Clear checklists and a single point of contact made it smooth."
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When schedules are tight, how do you balance speed with quality so standards don’t slip?
Employers ask this to check your judgment and consistency. In your answer, show how you prioritize tasks, maintain critical standards, and communicate trade-offs.
Answer Example: "I identify the must-do items—restrooms, kitchens, and high-touch points—and ensure those meet standards first. I batch tasks, set timers for dwell times, and use efficient tools like microfiber systems and backpack vacuums. If something has to move, I communicate it and schedule a catch-up block. I never compromise on safety or sanitation."
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What motivates you about custodial work, and how do you see your growth over the next few years?
Employers ask this to understand your intrinsic drivers and long-term fit. In your answer, connect pride in service with learning goals and possible career paths.
Answer Example: "I take pride in creating a clean, safe environment that people notice when it’s not there—being the reason it runs smoothly motivates me. I want to deepen my expertise in floor care and safety, and over time grow into a lead or facilities coordinator role. I enjoy mentoring others and improving processes as teams scale."
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If you joined us, what would your first 30 days look like to make an immediate impact?
Employers ask to see your planning and ownership mindset. In your answer, outline assessment, quick wins, relationship building, and setting up simple systems.
Answer Example: "Week one, I’d learn the space, understand priorities, and build routes and checklists. Weeks two and three, I’d standardize supplies, set par levels, and tackle quick wins like improving restroom consistency and spill response. By week four, I’d implement simple reporting and inspection routines and present a 90-day plan with metrics and budget ideas. I’d also build relationships with team leads to align on service windows."
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