Medical Laboratory Scientist Job Description (2026): Duties, Skills and Salary
A medical laboratory scientist runs the tests that diagnose and monitor disease: blood counts, cultures, chemistry panels, blood typing and more. They operate complex lab equipment, troubleshoot unusual results, and follow strict quality control procedures since clinicians make treatment decisions based on these results.
Medical laboratory scientists work in hospital labs, reference labs, blood banks and public health labs, often in rotating shifts since labs run around the clock. ASCP certification and a bachelor's degree in medical laboratory science or a related science are the standard path, with state licensure required in some states.
Medical Laboratory Scientist job description template
Copy it, replace everything in [brackets] and cut what doesn't apply. Keep the requirements to what the job really needs.
Template · replace the [brackets]
Medical Laboratory Scientist
[Company] · [City and office days, or remote with the countries or time zones you hire in] · [Full-time]
About [Company]
[Two or three sentences on what your company does, who it serves and why this team matters now.]
About the role
[Company] is hiring a medical laboratory scientist to run diagnostic testing in our [department, e.g. hematology, microbiology or blood bank]. You'll perform and verify test results, troubleshoot instruments, and keep our lab's quality control on track.
What you'll do
- Perform laboratory tests across [hematology, chemistry, microbiology or blood bank].
- Operate, calibrate and troubleshoot laboratory analyzers and instruments.
- Verify and interpret results, flagging critical values to the care team promptly.
- Run quality control and quality assurance checks per lab protocol.
- Maintain accurate records and documentation for regulatory compliance.
- Investigate unusual or discrepant results and determine next steps.
- Follow safety and infection control procedures when handling specimens.
- Train or assist laboratory assistants and students as needed.
What you'll bring
- Bachelor's degree in medical laboratory science, biology or a related field.
- ASCP certification (MLS or equivalent) or eligibility to obtain it.
- Hold licensure as required by state.
- Strong attention to detail and comfort with strict protocols.
- Ability to troubleshoot instruments and unexpected results independently.
- Clear communication with physicians, nurses and lab colleagues on urgent results.
Nice to have
- Experience in [a specialty area, e.g. microbiology, blood bank or molecular diagnostics].
- Familiarity with laboratory information systems (LIS).
- CLIA/CAP-regulated lab experience.
- Prior experience training or supervising lab staff.
What we offer
- [Pay range: e.g. $X–$Y base salary, plus bonus or equity if offered]
- [Shift differentials, continuing education reimbursement, sign-on bonus for night or weekend shifts]
- [Health cover, retirement or pension plan, paid time off, parental leave]
- [Work authorization: whether you can sponsor a visa or hire through an employer of record]
[Our process: a recruiter screen, a technical interview with the lab manager, a skills or competency assessment, and a lab shadow or working interview.]
[Your equal opportunity statement, and how candidates can ask for adjustments during the process]
Put the pay range in the ad. Several US states, including California, Colorado, New York and Washington, require it in job postings, and the EU Pay Transparency Directive gives applicants the right to know the starting pay or its range before the interview.
Medical Laboratory Scientist duties by seniority
What the job usually looks like at each level. Pitch the ad at one level and say which in the title.
Junior
- Runs standard tests and routine QC under supervision.
- Builds speed and accuracy across core testing areas.
- Learns the lab's instruments and documentation requirements.
Mid-level
- Runs a full testing menu independently across shifts.
- Troubleshoots instrument and result problems without escalation.
- Trains new staff and students on procedures.
Senior
- Specializes in a complex testing area and handles escalated or unusual cases.
- Leads quality assurance projects and regulatory inspection readiness.
- May act as a lead tech, supervisor or shift lead for the department.
Medical Laboratory Scientist career path
- Medical Laboratory Technician
- Medical Laboratory Scientist
- Senior MLS or Specialist
- Laboratory Supervisor or Manager
Medical laboratory scientist requires a specific science degree and ASCP certification, though some enter from a laboratory technician role and complete further education. From staff scientist, people move into specialty testing areas, supervisory and management roles, or education and quality assurance positions.
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Medical Laboratory Scientist job description FAQ
What does a medical laboratory scientist do?
Performs diagnostic lab tests such as blood counts, cultures and chemistry panels, operates and troubleshoots lab equipment, and follows strict quality control so clinicians can trust the results for patient care decisions.
What skills should a medical laboratory scientist job description require?
A bachelor's degree in medical laboratory science or a related field, ASCP certification (or eligibility), strong attention to detail, and the ability to troubleshoot instruments and unusual results independently.
Is medical laboratory scientist the same as a lab technician?
No. Laboratory technicians typically hold an associate degree and work under more supervision, while medical laboratory scientists hold a bachelor's degree, carry ASCP certification, and handle more complex testing and troubleshooting.