Best of luck with the interview.
I agree with the chaps above - test flying isn't all that well paid anyway (although comfortable - usually!), nor are many other specialist aerospace jobs. We do them because of all of the other non-financial rewards, and if you start off chasing money, that's probably how you'll stay.
Stick within aerospace, try to get yourself close to ops / test flying and, of-course, start getting your flying hours up, either as a pilot or (if you are lucky enough to find one) in an FTE job.
G