i don't know the exact date he got to the academy since it would've been early on, but there would've been some overlap during his academy time, and then served with some department until 2650, so if my brain is doing math right, they'd be out approx. the same time. i suspect noah did some icky stuff for the alliance, so he just like, doesn't want to deal with it and hides out on terminus like a neuro banksy, lol.