It might also be "a lost in translation" thing for what is a broad term.In general,
It is “overkill” to utilize an “engineer” to service oil, change a hydraulic pump, or fix a broken wire.
In England, an "engineer" is the guy who fixes your car- not like in the new world where an engineer is a licensed professional who stamps a set of technical drawings and certifies that the bridge won't fall down and the airplane's wings won't break off. It kinda depends on which English dialect Mad Max is using.