Interview questionsRead at source, 24 September 2026
Sterile Processing Interview Questions: What to Ask SPD Technician Candidates
This page is for the person hiring sterile processing technicians: the SPD manager, perioperative director or HR partner filling central service shifts. It is not interview prep for job seekers. Check certification first: HSPA lists seven states that require it, and in those states an uncertified hire comes with a legal deadline. Then use the interview for two things: whether the candidate will stop and reprocess rather than release something that failed a check when the OR is waiting, and whether they inspect and follow procedures exactly, every tray, every shift.
What a sterile processing technician does
Sterile processing (also called central service, central sterile or SPD) is the department that takes used surgical instruments and equipment and makes them safe to use on the next patient. O*NET classifies the work under medical equipment preparers: to “prepare, sterilize, install, or clean laboratory or healthcare equipment.” In a hospital that means four areas in sequence:
- Decontamination: receiving soiled instruments, cleaning them by hand and in washers, in full protective equipment.
- Preparation and packaging: inspecting each instrument for damage and residual soil, and assembling trays to the count sheet.
- Sterilization: running steam and low-temperature sterilizers, and recording the physical, chemical and biological monitoring results.
- Storage and distribution: checking that stored sterile items are intact and in date, and getting the right trays to the OR on time.
The technician rarely sees a patient, but every patient in the OR depends on them. A missing instrument delays a case; an instrument with bioburden, a pack with a failed indicator or a load released early can harm someone. That is why this interview is about precision and nerve rather than personality. If you are hiring the OR side as well, see the surgical technologist job description. To find candidates in the first place, see our guide to recruiting sterile processing technicians.
What to check before the interview: certification and state law
Two national bodies certify sterile processing technicians. The Healthcare Sterile Processing Association (HSPA) awards the CRCST (Certified Registered Central Service Technician). Full certification requires 400 hours of hands-on experience in a sterile processing department within the previous five years: 120 in decontamination, 120 in preparing and packaging, 120 in sterilization and disinfection, 24 in storage and distribution and 16 in quality assurance. Candidates can also test first and complete the 400 hours within six months of passing (provisional certification). The exam is 150 multiple-choice questions in three hours. The Certification Board for Sterile Processing and Distribution (CBSPD) offers a technician certification and others for endoscope reprocessing, management and ambulatory surgery; its fee covers certification or recertification for five years.
Some states make certification a condition of employment. HSPA’s legislation page (modified 8 September 2026) lists Connecticut, Delaware, Minnesota, New Jersey, New York, Pennsylvania and Tennessee as states where certification is required, and Florida, Oregon and South Carolina as active on legislation or regulation. HSPA itself warns the page may not reflect the most current information, so read your own state’s statute. One example read at source: New York Public Health Law § 2824 gives a central service technician who is not yet certified eighteen months from the date of hire to obtain the CRCST or the certified sterile processing and distribution technician credential, and requires ten hours of continuing education a year to remain qualified.
In a state that requires certification, an uncertified hire comes with a deadline. Write it into the offer, with who pays for the exam and how the 400 hours will be logged.
Settle the candidate’s status before the interview: certified (which credential, expiry, verify it with the issuing body), provisional (how many of the 400 hours are done), or not yet started. None of these is automatically a no, but each changes the start date and the training plan.
Nine sterile processing interview questions
Ask all nine of every candidate in the same order, and have your SPD lead or educator on the panel; they will hear a wrong answer that a recruiter will not. Several of these work better with an instrument or a tray on the table.
“Walk me through an instrument’s trip from the end of a case back to a sterile tray on the shelf.”
A strong answer goes in order and is specific: point-of-use treatment in the OR, transport in closed containers, sorting and manual cleaning, washer, inspection under light or magnification, assembly to the count sheet, packaging, the right sterilization cycle, cool-down, storage and a traceability record at every step. Experienced candidates mention the instructions for use (IFU) without prompting.
Weak answers skip steps or treat cleaning as a quick rinse. A candidate who does not know that an item has to be clean before it can be sterilized will not be safe in your department.
“You’re assembling a tray and find dried debris in the box lock of a clamp that has already been through the washer. What do you do?”
The only right answer is to send it back to decontamination for reprocessing, and report it so someone looks at the cleaning step or the washer. Good candidates also check the rest of that tray and set. The candidate who would “wipe it off and keep going” because the OR is waiting is the candidate you cannot hire.
“The OR needs a tray in 20 minutes. It’s in a load whose biological indicator hasn’t read yet. What do you do?”
You want someone who knows your release rules exist for a reason and escalates instead of improvising: check whether there is another set, tell the charge person and the OR the real time, and follow the department’s policy on releasing loads, especially loads containing implants. Candidates who say they would release it because “the cycle was fine” are telling you they will make that call alone at 2 a.m.
“You open a pack and the internal chemical indicator hasn’t changed. What next?”
Do not use it; pull it, report it, and check the rest of that load and the sterilizer’s records. This is a knowledge check, and a certified candidate should answer instantly. An entry-level candidate may not know the term; if they say they would not use anything that looked wrong and would ask a lead, that is the right instinct.
“Show me how you’d inspect this instrument.”
Hand them a pair of scissors, a clamp or a laparoscopic instrument. Watch whether they open and close the jaws, check the tips and box lock, look for cracks, rust, pitting and damaged insulation, and use magnification if you have it. You learn more in two minutes than from any description.
“Tell me about a time a surgeon or OR nurse was angry at sterile processing. What happened?”
Every SPD tech has one: a missing instrument, a late tray, a wet pack. You want someone who stays factual, fixes what they can, reports what they cannot, and does not take shortcuts to make the complaint stop. Strong answers include what changed afterward. Candidates who describe the OR as the enemy will make the relationship worse.
“Which sterilizers, washers and tracking systems have you worked with?”
Steam and low-temperature sterilizers, ultrasonic cleaners, washer-disinfectors, and an instrument tracking system are the usual set. Brands matter less than whether they can describe loading, cycle selection, and what they do when a cycle fails. An entry-level candidate from another healthcare role will have none of this; ask instead about following written procedures exactly.
“Decontamination means hours in a gown, gloves and face shield in a warm room. How have you handled physically demanding work?”
Be honest about the conditions: standing all shift, lifting heavy trays, heat, noise. Ask how they have handled similar work before. Candidates who have done warehouse, kitchen or cleaning work often do well here. Ask only about ability to do the job as described, not about health conditions.
“What is your certification status, and when does it expire?”
Ask which credential (CRCST from HSPA, or the CBSPD technician certification), the number and the expiry, and verify it with the issuing body. For provisional candidates, ask how many of the 400 hours are logged. For uncertified candidates in a state that requires it, ask whether they will commit to the deadline and whether they have started studying.
Red flags, and answers that only sound like problems
- Worth acting on: willingness to use or release something that failed a check because the OR is waiting; skipping inspection; vagueness about indicators from someone who says they are certified; blaming the OR for every conflict.
- Not a problem: no SPD experience from a candidate coming from another healthcare, lab or detailed manual job; slow, careful answers on the inspection practical; “I’d ask my lead” on a release decision, which is correct.
Questions not to ask
Ask whether the candidate can meet the physical demands and shift pattern as written, not about medical conditions, pregnancy, disability or workers’ compensation history. Ask about availability for nights, weekends and call, not about childcare or religion. Vaccination and health screening follow your facility’s occupational health process after an offer, not the interview. See illegal interview questions.
How to score it
Score patient-safety judgment (the debris, indicator and early-release questions) highest; a wrong answer there is disqualifying whatever the rest of the score. Score technical knowledge on the practical, and teamwork on the OR question. Write benchmark answers before the first interview and score each answer 1 to 4 individually; the interview scorecard template has a rubric. Then check references for accuracy and attendance with a previous SPD lead where you can; see reference checks.
Pay, and what it means for the offer
BLS has no Occupational Outlook Handbook entry for sterile processing. O*NET, using BLS wage data, reports a 2025 median for medical equipment preparers of $22.93 an hour, $47,700 a year, with 76,500 people employed in 2024 and employment projected to grow much faster than average (7 percent or higher) through 2034. Hospitals compete for the same certified technicians, and certification is a real differentiator in states that require it.
What goes in the offer: the hourly rate and any differential for evenings, nights or weekends; the shift and whether call is involved; who pays for the certification exam and continuing education; and, for uncertified hires, the deadline and how the 400 hours will be supervised and logged. Say the rate and shift in the first line of the job ad. Sterile processing is not its own row in Boostpoint’s 2026 Social Job Advertising Benchmark; the healthcare and senior living sector had a median cost per applicant of $15.42, a middle half of $7.89 to $39.61 and a 16% apply rate. Cost per applicant is not cost per hire. For wider context see the healthcare workforce shortage, and for related roles, patient care technician and CNA interview questions.
Frequently asked questions
What should you ask a sterile processing technician in an interview?
Ask them to walk an instrument from the OR back to the shelf, what they do with debris found after the washer, a tray needed before its biological indicator reads, a chemical indicator that did not change, and an inspection practical. Add a conflict with the OR, the equipment they have used, how they handle the physical demands, and their certification status.
What certifications do sterile processing technicians have?
The two main technician credentials are the CRCST from the Healthcare Sterile Processing Association and the technician certification from the Certification Board for Sterile Processing and Distribution (CBSPD). The CRCST requires 400 hours of hands-on experience within five years, which can be completed within six months after passing the exam under provisional certification.
Which states require sterile processing certification?
HSPA's legislation page, modified 8 September 2026, lists Connecticut, Delaware, Minnesota, New Jersey, New York, Pennsylvania and Tennessee as requiring certification, with Florida, Oregon and South Carolina active on legislation. HSPA notes the page may not be current, so check your state statute. New York, for example, gives uncertified hires eighteen months from hire to certify.
Can I hire an uncertified sterile processing technician?
In most states, yes. In states that require certification, the law usually sets a deadline after hire. New York's is eighteen months. Put the deadline, exam fees, study support and how the 400 hands-on hours will be logged into the offer. Uncertified candidates from other healthcare or detailed manual jobs often become strong technicians.
What is the most important sterile processing interview question?
Any of the patient-safety scenarios: debris found after the washer, a chemical indicator that did not change, or pressure to release a tray before the biological indicator reads. The right answer in each is to stop, reprocess or escalate, never to release. A candidate who would cut the corner because the OR is waiting should not be hired.
What does a sterile processing technician make?
O*NET, using BLS wage data, reports a 2025 median of $22.93 an hour or $47,700 a year for medical equipment preparers, the occupation that includes sterile processing technicians. BLS has no Occupational Outlook Handbook entry for the role. Shift differentials and certification often move the actual rate.
Should a sterile processing interview include a practical?
Yes. Hand the candidate an instrument and ask them to inspect it, and if you can, a count sheet and a partial tray. It shows whether they check jaws, tips, box locks and insulation, and whether they work to the sheet. Keep it short and unpaid only if it is an assessment, not productive work.
What are red flags when interviewing sterile processing technicians?
Willingness to use or release an item that failed a check, skipping inspection, vague answers about indicators from someone who claims certification, and describing the OR as an enemy. A lack of SPD experience is not a red flag for an entry-level role if the candidate follows procedures exactly and asks when unsure.
The hard part is getting SPD technicians to apply.
We put sterile processing and other hospital openings in front of healthcare workers on Facebook and Instagram, with pay and shift up front and a short application. Median cost per applicant across 891 managed campaigns, all roles: $13.88.
Book a DemoWage figures: O*NET 31-9093.00 (BLS 2025 wage data). Certification rules read at HSPA, CBSPD and the New York State Senate. Benchmark: Boostpoint 2026 Social Job Advertising Benchmark, 891 managed Meta campaigns.