Not possible to have done all of those things in a 4 year period during that timeframe...
This is claimed to have been done prior to Rivet Workforce (Hyd-Engines-APG combined into one career field).
I suspect he’s inflating his resume...
As a prior jet mech, that’s my story and I’m sticking to it. ;^)
Or,...and stick with me on this because it gets complicated...the media got it wrong.