I've been looking into the NUPOC program and it looks really interesting, especially being a power instructor. My question is can you be guaranteed that position or is it luck of the draw? Also, is it possible to attend grad school while being a power instructor, I'm finishing a Math/Physics degree and I want to go to grad school to pursue a Ph.D in physics but I also want to join the Navy, so is it possible to do both at the same time? If not can you go to grad school after the Navy, I know GRE scores expire after some time so I'm not sure how well that would work.