Become an aircraft maintenance engineer
The Aircraft Engineer is also known as an Aircraft Technician at times. While engineer is the commonly used term in UK, technician means the same thing within the aviation industry.
Civil Aviation is a highly regulated and respected industry controlled by national aviation authorities. To maintain the enviable safety standards that have been established, people working within the industry must be licensed. In other words, just as Pilots are trained and then licensed to fly aircraft, Engineers are trained and licensed to maintain aircraft and then release those aircraft into service.
So, in short, a student wishing to establish a career in the Aviation Industry must undertake professional training leading to the appropriate qualifications and certification.