I maintain my own.
Other peoples, I design, test and analyse. Actually nowadays I mostly teach other people how to.
The problem is, aircrew (such as possibly those who run this forum!) often believe that aeroplanes magic themselves into existence, and then all they need is flying and maintaining until eventually you scrap them.
I shouldn't worry - both our professions are essential, and I've heard some pretty patronising things said about aircrew by engineers over the years, we all survive it.
Engineers and Technicians A forum for the non-flying (and occasionally flying) technical professionals who really ensure safe and successful aviation.
G