• Maintenance of Aircraft - Aerospace Engineers test new aerodynamic and aviation systems, and maintain them.
• Aircraft Designer - Aerospace Engineers specializing in this field deal with designing, constructing, and testing aircraft, missiles, and spacecrafts. They may conduct basic and applied research to evaluate adaptability of materials and equipment to aircraft design and manufacture.
• Aviation Engineer- Aerospace Engineers in this field deal with the airport design, aircraft navigation technologies, and aerodrome planning.
• Defence - Aeronautical Engineers in this field deal with creation, maintenance and deployment of defence aircrafts such as fighter jets, choppers, bombers, etc. Also the job requires to be able to handle such aircraft at necessary times.

Hope this helps.