To be honest.....
The title of "Engineer" belongs to a Graduate from a University with a degree.
Airline Mechanics and other Technicians that call themselves "Engineers" actually piss me off!
The Airline Industry started with the title as Ground Engineer or Engineer due to the fact that a job such as a Flight Engineer were called a Flight Engineer...Instead of a Flight Mechanic or a Flight Technician.
Therefore the ground mechanics started calling themselves Ground Engineers!! To be even with the Flight Engineer??
If you are a Mechanic you are a Mechanic or at the most a Technician....but most definately not an Engineer.
It would be the same If a Nurse call himself a Doctor??