Lab Technician Interview Questions
& Model Answers, 2026

Check the sample against the request for identity, quantity, container and condition, record receipt with date, time and receiver, verify any temperature requirement was maintained in transit, assign a unique identifier, and store under the specified conditions with the stability window noted. Anything out of specification on arrival is recorded and reported rather than quietly processed. Sample identity errors are the failure that invalidates everything downstream.

Confirm the instrument is within its calibration and maintenance interval, run the system suitability or performance check required by the method, check consumables such as columns, lamps or electrodes, verify the correct method and parameters are loaded, and record it all. If system suitability fails, the run does not proceed. Data generated on an instrument that failed its check cannot be used, so the check comes first every time.

Records that are attributable, legible, contemporaneous, original and accurate: written at the time in permanent ink or the electronic system, signed and dated, no blank fields, corrections made with a single line through the error, the correction, initials, date and reason — never obliterated or overwritten. Recording results before the work is done, or copying from a scrap of paper later, is a data integrity finding rather than untidiness.

Use materials of the specified grade with lot numbers recorded, calibrated balances and volumetric glassware, follow the written procedure, label with identity, concentration, preparer, preparation date and expiry, and record the calculation and weights in the record so the preparation can be reconstructed. Standards are traceable to a certified reference where the method requires it. Unlabelled solutions on a bench are discarded, not used.

Clean work areas and dedicated equipment where cross-contamination matters, correct order of work from low to high concentration, appropriate cleaning between samples with documented cleaning verification for critical applications, single-use consumables where available, gloves changed appropriately, and blanks run to demonstrate the controls work. In microbiology or cell culture, aseptic technique with a certified biosafety cabinet and environmental monitoring.

Reading the safety data sheet before using an unfamiliar chemical, correct personal protective equipment for the hazard, fume hood use for volatiles, segregation and labelling of waste streams, awareness of incompatible chemicals in storage, knowing where the spill kit, eyewash and shower are, and reporting near misses. Where biological material is handled, the containment level and disinfection procedures for that agent.

Panels want immediate disclosure, an assessment of what was affected, and the corrective action. Concealing a laboratory error is a data integrity issue and the single fastest way to fail this interview.

Strong answers check the obvious causes — sample mix-up, dilution error, instrument condition, calculation — before reporting or repeating, and record the investigation rather than simply rerunning until a result looks acceptable.

Interviewers look for prioritisation by sample stability and turnaround requirement, sensible batching of similar analyses, and flagging to a supervisor when the workload starts to threaten quality rather than quietly rushing and generating a result nobody can trust.

Good answers follow the procedure as written and raise the improvement through the change control route. Deviating from a controlled procedure because it seems better is a serious finding in a regulated laboratory.

Anchor and position. The BLS OEWS May 2025 national median for biological technicians is $60,390 a year ($29.03/hr), with the top 10% above $92,040 — a broad technician series covering several laboratory settings. Position on the techniques and instruments you run independently, the regulatory environment, and shift arrangements.

Regulated environments such as GMP quality control often pay somewhat better and are more procedural; academic and research laboratories offer variety and technique breadth with tighter budgets. Ask about the environment and the documentation expectations, because the daily work differs more than the pay does.

Training on specific instruments, shift patterns and any weekend cover, progression to analyst or scientist roles, tuition support, and the instruments you would actually be trained on. Instrument training is the most transferable asset a technician can accumulate.