Polysomnographic technologist
A polysomnographic technologist (formerly called a polysomnographic technician) performs overnight, daytime, or home sleep studies, polysomnograms, on people with suspected sleep disorders. In the United States and worldwide, the process for becoming a polysomnography technician or technologist is primarily either on-the-job or certificate based.
Source: Wikipedia — Polysomnographic technologist (CC BY-SA 4.0)