Ask HN: What to do when the company you work at is about to IPO?

Hey folks! Posting for a friend who would obviously prefer some anonymity. They work at a company which is getting ready to file for IPO, and they have options to purchase shares. I'm assuming the first step is probably "talk to a lawyer and/or accountant", but even that is kind of an unknown: what kind of lawyer or accountant? How do you find a good one?

Any tips welcome. Thanks all!