Those who aspire to fly for a living can do it for a livelihood, whether in the cockpit or on the ground. Piloting, engineering and mechanics, airport operations, and aircraft manufacture are all careers in aviation that provide numerous prospects for progression. These positions are frequently found in commercial airlines, private industrial firms, airports, and government agencies. Before selling an aircraft, a good deal of aviation and aerospace manufacturing businesses engage technicians and engineers to conduct repairs and maintenance services on it.