Test pilots are highly skilled aviators who fly new or modified aircraft to evaluate their performance, safety, and handling characteristics. They work closely with engineers and designers to identify any issues and ensure that the aircraft meets safety standards before it is released for commercial or military use. These pilots undergo extensive training and often have backgrounds in engineering or military aviation. Their work is crucial in the development of advanced aircraft, including military jets and commercial airliners, ensuring that they are safe and reliable for future flights.