What should I wear to a sterile processing interview?

Wear clean, simple business casual clothes, like slacks and a plain top, with closed-toe shoes. Keep nails short and jewelry small, since that matches the rules in the department. Clean scrubs are fine at some places too.

What are the most common sterile processing interview questions?

Expect questions about the steps of the cycle, PPE in decontamination, how you inspect instruments, what chemical and biological indicators show, and what you do if a load fails or a tray is missing an item. Most interviews also ask about your shifts and your certification plans.

Do I need to be certified to work in sterile processing?

It depends on your state. HSPA lists Connecticut, Delaware, Minnesota, New Jersey, New York, Pennsylvania, and Tennessee as states that require it, often within a set time after you are hired (Minnesota's rule starts with people hired in 2028), and that list can change. Most states do not require it. Many hospitals still prefer or require it. The two main certifications are the CRCST from HSPA and the CSPDT from CBSPD, and HSPA also asks for hands-on hours in a department.

What is the difference between cleaning, disinfection, and sterilization?

Cleaning removes blood, tissue, and dirt. Disinfection kills most germs, and sterilization kills all of them, including spores. Cleaning always comes first, since dirt left on an instrument can shield germs from the sterilizer.

What is the best way to practice for a Sterile Processing Technician interview?

Say your answers out loud, on a timer, and fix one thing each time. Reading a list of questions is not enough. The free tool at the top of this page asks the first Sterile Processing Technician question and scores your spoken answer. No account needed for the first round.

Sterile Processing Technician Interview Questions and Answers (2026) + Free Practice

What a Sterile Processing Technician interview is like

A sterile processing technician interview usually lasts 30 to 45 minutes with the department manager, a supervisor, or a lead tech, and sometimes HR. They ask how instruments move through the department, how you handle detail work, and what you would do if a load fails or a tray is not complete. Some departments add a short quiz on terms or naming instruments.

Sterile processing interviews are about steps and safety. Expect questions on decontamination, inspection and assembly, sterilization, and the indicators that show a load passed. They want to hear that you never skip a step, even when the operating room is waiting. They also ask about PPE, standing for a full shift, and whether you can work evenings, nights, or weekends. Certification rules vary by state, so they may ask if you are certified or when you plan to test.

Every Sterile Processing Technician employer is checking for the same few things:

Attention to detail. You check every instrument for soil, damage, and the right count before a tray goes out.
Following the steps. You follow the manufacturer's instructions for use (IFU) and department policy every time, even when you are rushed.
Safety habits. You wear full PPE in decontamination and handle sharps and chemicals with care.
Speaking up. You tell your lead about a failed indicator, a dirty instrument, or a missing item right away.
Reliability. You show up for your shift, since the operating room cannot start cases without your trays.

Have one true story ready for each line above. Most of the questions below are asking for one of them.

Sterile Processing Technician interview questions and how to answer them

These are the questions Sterile Processing Technician interviews ask most, with what the interviewer is checking and what a strong answer includes.

Tell me about yourself and why you want to work in sterile processing.
What they are checking: Whether you have a real reason for this work and can say it in about a minute. A strong answer: Name your training or externship, say you like careful, hands-on work, and connect it to keeping surgery patients safe.
Why do you want to work in our department?
What they are checking: Whether you looked into the hospital or center and plan to stay. A strong answer: Name one real thing, like the kinds of surgery they do, their training for new techs, or their shift options.
Walk me through how an instrument moves through sterile processing.
What they are checking: That you know the full cycle in order. A strong answer: Go in order: point-of-use treatment and transport, decontamination and cleaning, inspection and assembly, packaging, sterilization, storage, and delivery back to the OR. Say cleaning comes first, since an item that is not clean cannot be sterilized.
What PPE do you wear in decontamination, and why?
What they are checking: That you protect yourself from blood, body fluids, and chemicals. A strong answer: Name a fluid-resistant gown, heavy-duty gloves, a face shield or goggles with a mask, a hair cover, and shoe covers. Say you put it on before you enter and take it off before you leave.
How do you inspect an instrument before it goes into a tray?
What they are checking: Whether you know what to look for. A strong answer: Look under lighted magnification for soil in hinges, box locks, and teeth. Check for cracks, rust, and bent tips, test that it works, and send anything dirty back to decontamination.
When would you use steam sterilization, and when would you use low-temperature sterilization?
What they are checking: Basic knowledge of sterilization methods. A strong answer: Steam uses high heat and pressure and is used for most surgical instruments and other items that can take heat and moisture. Low-temperature methods, like hydrogen peroxide or ethylene oxide, are for items that heat or moisture would damage. The IFU tells you which method each item can take.
What do chemical and biological indicators tell you?
What they are checking: That you know how a load is checked. A strong answer: An outside chemical indicator, like tape, shows the package went through a cycle. An inside indicator in the tray shows the steam or gas got inside. A biological indicator holds live spores and shows the cycle killed them, and loads with implants wait for that result. Mention the printout of time, temperature, and pressure, and the daily air removal test run in an empty pre-vacuum steam sterilizer before the first load.
What would you do if a load failed or a biological indicator came back positive?
What they are checking: That you will stop the load and tell someone. A strong answer: Say you would not release the load, take the sterilizer out of service, and tell your supervisor and infection prevention right away. Follow policy to recall items from that load, and if the failure is confirmed, every load back to the last negative biological indicator. Do not use the sterilizer again until it is retested and passes. Then document it and reprocess the items.
What would you do if a tray was missing an instrument and the OR needed it soon?
What they are checking: Whether you stay accurate under pressure. A strong answer: Say you would look for the item or replace it from stock, note it on the count sheet, and tell your lead and the OR. You would never send an incomplete tray as if it were complete.
Tell me about a time you caught a mistake before it caused a problem.
What they are checking: Your attention to detail and honesty. A strong answer: Give a real story from training, an externship, or another job. Say what you noticed, what you did, and how it turned out.
Tell me about a time you disagreed with a coworker or were rushed by someone outside your team.
What they are checking: Teamwork and staying calm with nurses and OR staff. A strong answer: Stay calm and fair. Show that you explained the steps that had to happen, offered a real option, and asked your lead for help when needed.
Can you work evenings, nights, weekends, or on call?
What they are checking: Whether you can fill the shifts they need. A strong answer: Be honest and clear. Many departments run around the clock, so say what you can do and mention if you can pick up extra shifts.

A sample answer

Question: "Tell me about a time you caught a mistake before it caused a problem."

"During my externship in a hospital sterile processing department, I was putting together a basic surgery tray. I checked each instrument under the lighted magnifier, the way my preceptor taught me. In the box lock of one pair of scissors, I saw a small brown spot that looked like dried blood. The tray was due in the OR that afternoon, and the spot was easy to miss. I set the scissors aside, showed my preceptor, and sent them back to decontamination to be cleaned again. I pulled a clean pair from stock so the tray was complete, and I noted the swap on the count sheet. My preceptor checked the rest of that cart and found one more dirty instrument. The tray went out on time, and both instruments were cleaned again before use."

Why it works: It is a real story from training, so it counts without a paid job. It shows careful inspection, following the steps under time pressure, and telling the preceptor right away. It ends with a clear result.

Use your own story, in the same shape: what was going on, what you did, and how it ended. The STAR method guide shows the shape step by step.

How the Sterile Processing Technician interview changes by workplace

Hospital central sterile department. Hospitals process trays for many kinds of surgery, often around the clock. Expect questions about high volume, many instrument sets, working with the OR, and evening or night shifts.
Surgery center. Smaller teams and a set schedule of cases mean you may do every step yourself. Expect questions about fast turnover between cases and doing decontamination, assembly, and sterilization on the same shift.
Clinic or outpatient sterile room. You may be the only person who reprocesses instruments for the clinic. Expect questions about running a small sterilizer, keeping logs, testing with indicators, and working alone with care.
Third-party reprocessing company. These companies clean and sterilize instruments for hospitals and clinics. Expect questions about production pace, tracking systems, quality checks, and following written steps exactly.

If you have no sterile processing experience yet

Lead with your training and externship. Name the type of department, the hours you completed, and the tasks you did, like cleaning, assembly, or loading a sterilizer.
Name your certification, like CRCST or CSPDT, or the date you plan to test. Rules vary by state, so ask what this employer requires.
Warehouse, food prep, and factory jobs show you can follow written steps, stay on your feet, and keep quality high. Say that plainly.
Learn the basic instrument names and the steps of the cycle before the interview, since some departments ask you to name instruments.

Still looking for training? Read how WIOA can pay for sterile processing training.

Questions to ask the employer

Near the end, they will ask if you have questions. Have two or three ready. Good ones for a Sterile Processing Technician job:

What does a typical shift look like for a new tech here?
How long is training, and will I work next to an experienced tech first?
How do you track trays and instruments through the department?
Do you require certification, and do you help new techs prepare for it?
How does the department work with the OR when a tray is needed fast?

After the interview, send a thank-you email the same day. If the date they gave you passes, here is how to follow up after an interview. If they make an offer, use a salary negotiation email before you say yes.

Your Sterile Processing Technician resume

The interview comes after the resume gets you the call. Put your license or training at the top, then the work that shows the habits this job screens for.

Interview questions for other jobs

Got a one-way video interview instead? See the one-way video interview guide.

Sterile Processing Technician Interview Questions and Answers