These fields are in airline careers.
Air Traffic Controllers - are highly trained individuals who are required to maintain a safe, orderly flow of air traffic.
Captains - are the person among other pilots aboard an aircraft who is the highest in charge and responsible for the aircraft's operation and safety.
Flight Attendants - are employed by an airline. They attend to the comfort of passengers aboard commercial flights. They ensure the safety of the cabin and also serve drinks and/or food to passengers.
Pilots - are in charge of flying a commercial aircraft.