Aerospace engineers perform and supervise the design, development, manufacture and maintenance work of all types of flight vehicles. This may include military and civilian airplanes, helicopters, missiles, launch vehicles, spacecraft, satellites, control and guidance systems. Aerospace Engineers usually specialize in a particular field such as aerodynamic fluid flow, structural design, navigation, robotics, propulsion and combustion. They may also choose to specialize in an aerospace product, such as helicopters, jets, or rockets. Career opportunities exist with aerospace companies, aircraft manufacturers, aeronautical consulting services and the Defense sector.