Clinical Laboratory Scientist Career Guide
Clinical Laboratory Scientists test and analyze blood, tissue, and other body fluids using complex instruments and manual techniques. Daily tasks include processing specimens, performing biochemical, hematologic, microbiologic and molecular assays, troubleshooting instruments, validating results, logging and reporting data, enforcing quality control and safety protocols, collaborating with clinicians, and maintaining accurate documentation in a regulated environment.
What skills does a Clinical Laboratory Scientist need?
How do I become a Clinical Laboratory Scientist?
Choose and complete an accredited degree or certificate
Enroll in a NAACLS- or regionally-accredited MLS/medical laboratory science bachelor's program or a related degree with an accredited clinical practicum; alternatively complete an accredited certificate or associate program.
Complete clinical practicum and gain hands-on experience
Finish the required clinical rotations in hospital or clinical labs to build practical skills in specimen handling, instrumentation, and core test areas under supervision.
Earn national certification and any state licensure
Prepare for and pass a recognized certification exam (e.g., ASCP BOC); apply for state licensure where required to meet legal practice requirements.
Land an entry-level laboratory position
Apply for roles such as Clinical Laboratory Scientist, Medical Laboratory Technician (if bridging), or equivalent; highlight clinical practicum, certification, and lab skills on your resume.
Advance through specialization and leadership
Gain experience, pursue advanced certifications (molecular, microbiology, blood banking), seek senior technologist or supervisory roles, or transition to management, research, or industry positions.
What education do you need to become a Clinical Laboratory Scientist?
Recommended: Bachelor of Science in Medical Laboratory Science, Clinical Laboratory Science, Medical Technology, or a related biological science from an accredited program with a clinical practicum. Alternatives: Associate degree in clinical laboratory technology plus completion of an accredited certification/bridge program, or a bachelor’s in biology/chemistry followed by an accredited MLS certificate program.
Recommended Certifications for Clinical Laboratory Scientists
- ASCP Board of Certification (MLS) – Medical Laboratory Scientist
- AMT (American Medical Technologists) Registered Medical Laboratory Scientist (RMLS)
- Specialty certifications: ASCP Specialist in Microbiology (SM), Molecular Biology (MB), or Blood Banking (SBB)
- State licensure where required (varies by state)
Clinical Laboratory Scientist Job Outlook & Demand
Demand for Clinical Laboratory Scientists is projected to grow steadily over the next decade due to aging populations, increased diagnostic testing, and advances in molecular diagnostics. Replacement needs from retirements and expanded testing capacity in hospitals, clinics, public health and industry will sustain opportunities, though growth rates vary regionally and by specialty.
Frequently Asked Questions About Becoming a Clinical Laboratory Scientist
What is a Clinical Laboratory Scientist and what do they do?
A Clinical Laboratory Scientist (CLS) performs complex laboratory tests on patient samples, analyzes results, maintains instruments, ensures quality control, and communicates findings to clinicians to support diagnosis and treatment.
How long does it take to become a Clinical Laboratory Scientist?
Becoming a CLS typically takes 3–5 years: a 4-year bachelor’s degree in medical laboratory science or a related field, or a 2–3 year associate plus an accredited certificate/bridge program, then certification and clinical training.
Do Clinical Laboratory Scientists need certification and licensure?
Most employers require national certification (e.g., ASCP) and many U.S. states require state licensure. Certification verifies competency and licensure authorizes practice in specific states.
What are common entry-level jobs and career progression for a CLS?
Entry-level roles include medical lab technician or junior CLS. With experience and certification you can advance to senior CLS, supervisor, laboratory manager, specialist (molecular/hematology), or roles in research and industry.
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