Polysomnographic technologists, often called sleep technologists, are the healthcare practitioners who perform a vital role in the diagnosis and treatment of sleep disorders. Polysomnographic (PSG) technologists operate a variety of sophisticated monitoring devices, which record brain activity (EEG), muscle and eye movements, respiration, blood oxygen levels, and other physiologic events. Technologists are also involved in the evaluation of various treatment methods. Polysomnographic technologists are typically employed in sleep laboratories located in medical centers, clinic/office settings, or free standing sleep labs. Some technologists transition into management and marketing of sleep centers, product sales and support, public and patient education regarding sleep disorders.