Some speculate says that aliens are already in NASA and have been there for some time. So might be NASA encountered with the fact that our planet is going to be in a trouble or they encountered with some nasty purpose of these creatures. The reason is not revealed by NASA, but a job opportunity is egress by them.
The qualification for the job by them isn't extreme. Advance knowledge of planetary protect and mission category requires perhaps. Pay scale for this job is somewhere between $124406 to % $187000. Willing applicants can drop their CV at NASA official site.