Senior Lab Technician Job Description and KRAs

A Senior Lab Technician is the experienced hand on the bench of a clinical lab. They run the complex analysers and tests, such as immunoassay, HPLC for HbA1c, coagulation studies or culture work, cover the lab alone on night shifts, and guide junior technicians through their daily work. They do first-level result verification and troubleshooting, which lets the supervisor manage the whole shift.

Detail	For this role
Department	Allied Health
Level	Mid level
Reports to	Lab Supervisor
Direct reports	Lab Technician
Experience	4 to 7 years as a lab technician, including night duty and specialized sections

Senior Lab Technician job description template

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Job title: Senior Lab Technician

Department: Allied Health

Reports to: Lab Supervisor

Location: [City], [office, branch or site]

About the role

Key responsibilities

Run and maintain the section's complex analysers, such as immunoassay, HPLC, blood gas or coagulation systems, including daily and weekly maintenance.
Perform manual and specialized tests such as peripheral smear review, reticulocyte counts, cross-matching or culture sensitivity, depending on the section.
Verify results entered by junior technicians against QC status, delta checks and analyser flags before they reach the supervisor.
Handle the lab single-handed on night shifts, covering emergency samples, critical values, QC runs and handover to the morning team.
Carry out calibrations and reagent lot changes, and record lot-to-lot comparison results before the new lot is used.
Troubleshoot analyser errors and sample flags, and decide when the service engineer must be called.
Train new technicians on analyser operation, sample handling and biosafety, and report on their readiness to the supervisor.
Keep bench stock at working levels and raise indents for reagents and consumables before they run short.
Follow biosafety and biomedical waste segregation rules, and correct juniors who do not.
Run EQAS samples for the section and support internal audits with records and explanations.

Requirements

BSc MLT, or DMLT with long bench experience
MSc MLT is an advantage
4 to 7 years as a lab technician, including night duty and specialized sections

KRAs and KPIs for a Senior Lab Technician

Key result areas for the appraisal form, each with a KPI you can measure every month or quarter.

Key result area	How to measure it
Night coverage	Night shifts handled with zero missed critical value calls and complete handover notes
Analyser maintenance	Daily and weekly maintenance logged on every due date
Verification quality	Results sent back by the supervisor for correction below 0.1 percent of verified results
Reagent lot changes	Lot-to-lot comparison recorded before every new reagent lot goes into use
Junior training	Assigned trainees ready for independent bench work within 45 days
Bench stock	No test delayed for want of bench reagents or consumables

Skills and tools

Immunoassay and HPLC operationHaematology smear reviewCoagulation testingCalibration and lot verificationDelta checks and result verificationWorking alone on night shiftsBiosafety and waste segregationTraining juniorsComposure during emergencies

Tools used day to day: Immunoassay analyser, HPLC analyser, Coagulation analyser, Haematology cell counter, Laboratory information system (LIS), Biosafety cabinet, Microscope.

Reporting line and career path

Moves up from: Lab Technician
Next roles: Lab Supervisor, Quality Executive (Lab)

Interview questions for a Senior Lab Technician

A patient's haemoglobin drops from 12 to 7 in a day with no bleeding noted. What do you do before release?
How do you verify a new reagent lot for TSH?
You are alone on nights and the analyser shows a probe error. Walk me through your steps.
What do you look for on a peripheral smear when the analyser flags blasts?
How do you teach a new technician to handle a critical value?
Tell me about an error you caught before a report went out.

Managing a Senior Lab Technician in ZeniaHR

AttendanceSenior technicians take a fair share of night duty, often one week in four, and sometimes stay back when the morning relief is late. Overtime detected from punches beyond the shift end then goes to the supervisor and HR for approval, and is paid or credited as comp-off under the overtime policy.LeaveLeave requests go to the lab supervisor first and then to HR. Only a few people can run HPLC or coagulation, so the supervisor should look on the team leave calendar for others trained on the same analyser before approving.Performance and KRAsA quarterly cycle with weighted goals for night coverage, maintenance logs, verification quality and trainee readiness keeps the review factual. The supervisor brings maintenance logs and night handover sheets to the meeting as evidence.

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Frequently asked questions

What does a senior lab technician do?

A senior lab technician runs the complex analysers and specialized tests, handles the lab alone on night shifts, verifies juniors' results before release, performs calibrations and reagent lot changes, troubleshoots analyser errors and trains new technicians. They are the first escalation point on the bench.

How many years does it take to become a senior lab technician?

Most technicians reach the senior grade after 4 to 7 years of bench work, including night duty and time in specialized sections such as immunoassay, coagulation or microbiology. Labs look for someone trusted to work unsupervised at night and to train others.

What is the difference between a lab technician and a senior lab technician?

A lab technician processes samples on assigned analysers under supervision. A senior lab technician runs the difficult tests and analysers, verifies other technicians' results, covers nights alone, handles calibrations and lot changes and trains juniors, so the supervisor can focus on the shift as a whole.