Job Description. Job Description. MAJOR RESPONSIBILITIES / ESSENTIAL FUNCTIONS. The primary job duties this position is responsible for achieving are listed in order of importance. Reporting to the Manager, demonstrates proficiency in the performance of Electrocardiograms (EKG’s) and the set-up of Holster Monitors to assigned age specific patient population (infants, pediatrics, adolescents, adults, and geriatrics) and participates in related con...