What Does a Medical Technologist Do?
Lab medicine is more complicated than most patients realize and covers more than just running a sample through a machine. The results a medical technologist signs off on may confirm a routine checkup, but more importantly they guide transfusions, cancer treatment and emergency care. Their job is distinguished from a lab technician's in that technologists take on complex tests, validate methods and often lead a section of a hospital lab.
Also known as: Senior Medical Technologist
Medical Technologist Duties and Responsibilities
The primary responsibilities of a medical technologist include:
- Perform complex tests in chemistry, hematology, microbiology, immunology and blood bank.
- Identify antibodies and select compatible blood for patients who need a transfusion.
- Review abnormal results and run follow-up tests before releasing them to physicians.
- Validate new instruments and methods and write the procedures staff will follow.
- Investigate quality control failures and decide whether patient results can be released.
- Identify bacteria and fungi in cultures and report antibiotic sensitivity results.
- Supervise and train lab technicians and students on the bench.
- Prepare for CAP, CLIA or Joint Commission inspections and proficiency testing.
- Call critical results to care teams and document who received each call.
- Troubleshoot analyzers with vendor support and keep maintenance records complete.
Required Skills and Qualifications
To succeed as a medical technologist, you will need the following skills and qualifications:
- MLS (ASCP) certification
- Blood bank antibody workups
- Microbiology identification and sensitivity testing
- Method validation and quality control statistics
- Laboratory information systems such as Epic Beaker or Sunquest
- State license where required, such as California or New York
- Sound judgment on when a result looks wrong
- Teaching and supervising technicians
Education and Training
Most medical technologists qualify through a bachelor's degree in medical laboratory science, but some start out by earning a biology or chemistry degree and completing a hospital-based certificate program. Employers expect MLS certification. To become a licensed clinical laboratory scientist, in a handful of states such as California and New York you will need a state license on top of certification to qualify to work.
Salary and Job Outlook
Typical pay: $47,650 - $81,450 per year, with a median of $62,930.
The range covers the middle half of earners nationwide. Source: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025, Clinical Laboratory Technologists and Technicians.
BLS projects employment of clinical laboratory technologists and technicians to grow about 3 percent from 2025 to 2035. That leaves roughly 20,800 openings a year across the group, many of them in hospitals replacing retiring staff. New graduates who accept evening or night shifts are more likely to get hired fast and move to days later.
Outlook source: U.S. Bureau of Labor Statistics, Employment Projections, 2025 to 2035, Clinical laboratory technologists and technicians.