I spent a lot of late nights helping him come up to speed because he's not a bad guy. Even though he probably should have been doing this himself, the fact of the matter is that he chose poorly and now knows a lot about something that is growing less and less valuable every day. You can say that he's not an "engineer" but that's really just the No True Scotsman fallacy talking. It's really hard to compete on the job market when hiring managers just cut out huge swathes of your knowledge a priori, and the fact that happens is what concerns me.