From what Ballz says, the military may have the same "administrative action"?
Administrative action is just a blanket term for things like remedial measures, administrative reviews, etc. The important part in this is that its separate from legal/judicial/disciplinary action, and the burden of proof is on a "balance of probabilities" as opposed to "beyond a reasonable doubt."
So as DAP said, an administrative review (AR) will be conducted to determine how to deal with the member going forward. If that AR determines that, on the balance of probabilities, the member committed these sex-related offences, then there is a wide array of possibilities available to deal with it. One of those possibilities in this case is most definitely a release.
So, all that to say, this isn't even a matter of just being unofficially blackballed for the rest of his career... there are still official things that can take place..