Yeah, what he said. :-) In addition one side effect of moving to and fro is that, as a trainer, you have to know _everything_ about your subject (not on the fi

Yeah, what he said. :-) In addition one side effect of moving to and fro is that, as a trainer, you have to know _everything_ about your subject (not on the first day but you will eventually). Most people learn just enough about a topic to get by. As a trainer, you're expected to know _everything_ about a subject so you do learn everything[0], which means when you transition back to engineering, you have a _lot_ of deep knowledge about your technical field(s). With that deep knowledge, I've been able to walk into problem situations that people have been poring over for hours and go "Here's how you fix that problem" and suddenly everything is working again. Also, it's a great way to learn how to present knowledge. More often than not, technical presentations I make within my current company elicit applause. [0] In a class I had been teaching for years, a student ask me a question about the some command. I didn't know the answer, so I spent several hours that night figuring it out, coming up with examples, and a small presentation so I could explain it to them the next day.