[Tubbs]

Speaking from experience, its not so much the NJP that will hurt you as the punishment you receive (i.e. reduction in rank). I got two NJP's while I was in. One was two weeks after I got to the fleet for underage drinking. The second one was right after we got back from Iraq and I caught a friend of mine boondoogling another buddies girlfriend while he was on a beer run. That wouldn't have been too much of an issue except for the fact that the BC decided that weekend would be a good time for a suprise MWR walkthrough and caught me holding him off of the third deck by his throat.
However, neither one invovled reduction in rank and I managed to get the second NJP overturned on review right before I got out becuase of that (if it wasn't severe enough to receive reduc, it wasn't serious enough to rate an NJP).
I'm in the background phase of my application with LVMPD and becuase the NJP's didn't involve being busted down they aren't counting against me and before, while I was pursuing reenlistment in the Army under an 18x contract, I had to write a statement about the incident, but at the time the weren't being held against me. Now I didn't get past MEPS for medical issue that were unbeknownst to me at the time so don't take that part as cannon. Again though, its the punishment that will hurt you more than the actuall NJP.