A medical technologist is a highly skilled health professional who tests and analyzes blood, other body fluids, and tissue samples. Medical technologists are responsible for operating and maintaining the equipment used to analyze specimens and ensuring that tests are completed in a correct and timely manner.

Medical technologists' training is more extensive than that of the medical lab technicians with whom they often work. Although medical technologists do not often interact directly with patients, their work is vital to the appropriate diagnosis, treatment, and care of patients.