I'm an attorney, I don't waive the attorney flag but if you're in the position to do so you absolutely need to have an experienced attorney in such a matter. The question you have to ask yourself, is something at stake? If something is at stake, you need to have an attorney. You're being accused of sexual assault at college, just by the term alone, it should seem incredibly serious because it is.
A school-provided advisor is not appropriate to the circumstances. They're not trained in such matters. They don't have the experience of such matters. I don't care who the person is, you need to have an experienced attorney who has a successful track record of addressing cases and getting favorable outcomes because it's not an easy process, so much is at stake. There's so much working against an accused party that you have to have somebody in your corner that's completely dedicated to your interest and completely focused on your case with no potential distractions otherwise. An experienced attorney advisor needs to be in your corner from the very start of the process.