Polygraph Examiners, also known as lie detector specialists, administer polygraph tests to individuals in various sectors, including law enforcement, security, and corporate settings. They are trained to analyze physiological responses (heart rate, blood pressure, and respiratory rate) during questioning to assess whether a person is being truthful. Polygraph Examiners use their expertise to assist in criminal investigations, pre-employment screenings, and security clearances. A certification from a recognized polygraph institute and training in physiological measurements and psychological analysis are required.