An aircraft engineer designs new airplanes or oversees the production of existing aircraft designs. As an aircraft engineer, your duties revolve around using physical, mathematical, and engineering principles to address flight problems and how to improve aircraft design. You work to increase fuel efficiency, speed, and safety features of a plane, as well as create comfortable interior features. You often work as part of a large team, overseeing the design, budgeting, and production of new aircraft. Some aircraft engineers work at airports, managing the daily maintenance and safety checks of planes.