take the EIT and work toward a PE
I've also got my degree in aerospace engineering. It's a very cyclical market though, and you are limited to where you can find work. I do civil structural now. It's not nearly as interesting, but it pays the bills and is located in more numerous places.
Whatever he does, tell him to take the E.I.T exam (often called the F.E. exam) right now! That stands for "Engineer in Training" or "Fundamentals of Engineering." But the way it works is you take that exam, work four years under the supervision of a P.E. (Professional Engineer), then you can take the P.E. exam.
Having a P.E. can open many extra doors for him that are closed to non registered engineers. With a P.E., he can seal legal documents, like building drawings. And while you don't need a P.E. to work at a major airframe maker, it is viewed as a plus and will help your salary. To work in Civil engineering, you pretty much have to have one.
Best of luck to him.