Some additional background info would help.
Are you a student finishing prototype or a staff?
Are you trying to go one of the new boats or wanting to be a part of the design program?
If you are trying to be a part of the actual design program, that's not gonna happen. At least, I could'nt dream up some way for that to happen.
If you are a student finishing prototype, you're going to the fleet. The Navy didn't spend upwards of $200k training and paying you to be an operator and not have you, you know, operate a plant.
The exception I've seen to this was back when NR-1 was still operational. Occasionally 1 or 2 students would get selected for the NR-1 support crew, which meant you were assigned to the crew that did the sub's upkeep while it was not preforming research missions.