I have been working at FAA full-time (More than 10 years)
There are many interesting and learning opportunities. The work seems endless. The NAS is on the cusp of a major transformation with commercial space and UAS, so the near future should be a very exciting time.
There are very few if any.
Advice to Management
I applied online. The process took 3+ months. I interviewed at FAA (Cleveland, OH) in July 2017.
Structured, everyone gets the same opportunity. There is basic questions that interviewers are instruction not to stray from. Study the position you want and ensure your able to fill 45 minutes of interview space because after the questions your the one speaking.