Radar101
As an ex RAF Air Engineer, we are (there are a handful left) a class of our own for many, some dubious, reasons. As a UK Chartered Engineer, I would suggest that this position was mis-named. I guess in modern parlance, I would have been an "Aircraft Systems Manager". The unfortunate Blue was a Technician, not an Engineer.
In N America, as already pointed out, an Engineer must hold a suitable engineering degree from a recognized body, and must be licenced. Sadly, in the UK, an "engineer" can be honest Dave (with no GCSEs), the dodgy bloke who fixes your washing machine.