A Flow Cytometry Technologist is a laboratory professional who specializes in operating and maintaining flow cytometry instruments to analyze cells and particles. They prepare biological samples, perform data acquisition, and interpret results for research, clinical diagnostics, or pharmaceutical applications. Their work is essential in immunology, hematology, oncology, and other medical fields. They also ensure quality control, troubleshoot instrument issues, and collaborate with scientists and physicians to provide accurate data for patient care or research.