Polysomnographic technician, also known as sleep technologists, performs sleep studies on individuals that have difficulty sleeping. These patients may be suffering from respiratory issues, obesity, or other health issues. As a polysomnographic technician, you typically work at night because most sleep studies are conducted during regular sleep cycles. Your job duties include preparing patients for a sleep study, monitoring the patient while they sleep, and recording the results of the study. The sleep trial may be used to document and track sleep issues, or they may test the effects of a new sleep-inducing medication.