Can I join the army reserve while on parole with my PO's consent?

I don't know why not IF the military will accept you.

Normally no, they will not take you on parole. If they do, they will have to ask for a waiver, just your prior prison is normally enough. ** This is assuming it was not a felony.

If it was a felony, I would say forget it.

But with that said, you can always go talk to a recruiter and ask