Top 6 Sterile Processing Technician Interview Questions (2026)

Behavioral questions

Past-experience questions. Answer with the STAR method: Situation, Task, Action, Result.

1. 1

   Tell me about a time you caught an error in the sterile processing workflow.

   What they're really asking: Quality awareness and accountability: catching a missing instrument in a count, an indicator that didn't change, a package that was compromised, or an instrument returned without proper decontamination. The story reveals whether the candidate engages with the quality system or just moves instruments through.

2. 2

   How do you prioritize when the OR needs an instrument set immediately and you have a full queue?

   What they're really asking: Triage and communication: OR priority cases take precedence; communicate to the OR coordinator what the realistic turnaround time is; never shortcut the process to meet a timeline. The OR needs to make scheduling decisions based on accurate information, not false promises.

Technical questions

Skill and knowledge checks. Be specific — name tools, tolerances, and methods.

1. 1

   Walk me through the complete decontamination-to-sterilization workflow for a surgical instrument set.

   What they're really asking: Complete process knowledge: point-of-use treatment in the OR, transport, receiving in decontamination (dirty side), manual or ultrasonic cleaning, rinsing, inspection, assembly, packaging, sterilization, biological indicator monitoring, and sterile storage. Each step has a patient safety rationale.

   Strong answer (sequential):

   Decontamination

   I receive instruments in decontamination wearing full PPE — face shield, gown, gloves. I pre-soak if needed, then clean manually or in the ultrasonic cleaner, using appropriate chemistry for the instrument type. Lumened instruments get flushed. Thorough cleaning is the most important step — sterilization cannot penetrate bioburden.

   Inspection and assembly

   On the clean side, I inspect every instrument: check function (hinged instruments open and close smoothly, clamps lock, scissors cut), look for damage (cracks, rust, missing tips), and verify against the count sheet before assembling the set. A damaged instrument found in the OR is a patient safety event.

   Packaging and sterilization

   I package in the appropriate wrap or pouch for the sterilization method, include a chemical indicator inside the package, and label with the sterilizer load number, date, and expiration. After sterilization I verify the external indicator changed correctly and check the printout for correct parameters before releasing the load.

   Biological indicator

   Biological indicators (spore tests) run in every load or per facility protocol are the gold standard for sterilization verification. A positive BI means the load is recalled, the sterilizer is taken out of service, and the biomedical engineering and infection control teams are notified.

   The positive BI recall response is the answer that shows you understand the stakes. Coworkers who've seen this response describe how the entire department responds immediately — it's not a minor event.

   Practice answering this question out loud →
2. 2

   What is the difference between disinfection and sterilization?

   What they're really asking: Fundamental distinction: disinfection reduces the number of microorganisms but may not eliminate spores; sterilization destroys all forms of microbial life including bacterial spores. Critical items (items that contact sterile tissue or the bloodstream) require sterilization; semi-critical and non-critical items may be appropriately processed with disinfection.

3. 3

   How do you handle an instrument that arrives in decontamination with dried blood or debris?

   What they're really asking: Pre-cleaning and soaking protocol: dried soil is harder to remove and requires pre-soaking with an enzymatic cleaner before cleaning. Running a soiled instrument through a washer without pre-treatment may not achieve adequate decontamination — and the sterilizer won't compensate for bioburden the cleaning step missed.

Situational questions

Hypotheticals that test judgment. Walk through your reasoning step by step.

1. 1

   What do you do when you're not sure whether an instrument is clean enough to proceed to assembly?

   What they're really asking: Stop-and-verify discipline: return it to decontamination and reprocess. The cost of reprocessing one instrument is nothing compared to the cost of a surgical site infection. When in doubt, don't release — it's not worth it.

How to prepare for a Sterile Processing Technician interview

• 1

  CRCST credential signals professional commitment

  IAHCSMM's CRCST is the industry standard credential. Many facilities require it within 12-18 months of hire. Pursuing it before or shortly after starting signals professionalism and commitment.

• 2

  The work is a patient safety function, not a cleaning job

  Sterile processing errors have caused patient deaths and surgical site infection outbreaks. Candidates who frame the role as essential to surgical outcomes make a stronger impression than ones who describe it as instrument cleaning.

• 3

  Documentation discipline matters here

  Load records, biological indicator results, instrument tracking, and recall documentation are legal records in some situations. Accuracy and completeness aren't optional.

• 4

  Ask about their instrument tracking system

  Facilities with barcode or RFID instrument tracking systems have better accountability and fewer lost instrument issues than manual tracking. The system also tells you about the facility's investment in sterile processing infrastructure.

Sterile processing technicians are in consistent demand across hospital and ambulatory surgery settings, with demand growing as surgical volumes increase. CRCST certification and leadership experience create advancement paths into sterile processing supervisor, OR materials management, and infection prevention roles.