That's a rabbit hole in itself too (I did mention going from a top school professorship to a military project though, so if the latter is a wrong rabbit hole at least one gets into a lucrative position).
I just think, if one wants to research Aliens, and if such projects DO exist (that's a huge IIIIIIF), then it's better than any other kind of job out there.
I think its likely that the Russian and Chinese spies would be applying for the cleaning, general administration and cooking jobs, so they can listen in on the chit chat in the lunch room and browse the filing cabinets at night. So in trying to to get a job in those general fields you will be competing against quite a few spies. They may even have a better looking but fake resume. Good luck :-)
I actually doubt. Those projects would be so guarded that one has to prove that one's father and mother are loyal too -- yeah that probably means it's a lot easier to get into if your parents are from the military too.
After all some people in the government are efficient.
