The duties of an automated teller machine (ATM) technician are to install, service, and repair ATMs and other electronic office machines that dispense money and allow a customer to check their bank account. An ATM technician, also known as a field technician, often needs to take apart the machine to diagnose problems. They use a variety of hand and power tools for the job and need to have a working knowledge of mechanical engineering and maintenance. An ATM technician also addresses computer problems, such as potential viruses or other threats to security.