I was sexually assaulted when I was in federal prison. I am home now. What can I do to press charges?

What occurred was not a penetrative rape but it was sexual assault none the less and it has bothered me so much that I want to do something about it because I think it will help me to heal. The person who did it is a lifer, but I don't care. I want him bumped up from a medium security facility to a maximum security facility.

I asked a support group for advice and they suggested that I contact the prison. This is something that I don't really want to do. Prison officials absolutely suck ass when it comes to reporting assaults. They aren't much better than the prisoners themselves.