Currently active Hiring Manager in Customer Success and Professional Services…

Well, it sounds like you made it through the gauntlet and have a real chance to land this job. Don't go into this phase thinking you'll have an easy time with an interviewer who wants you sail through - this round will challenge the depth of your knowledge more than any other. The presentation interview is truly make-or-break. Nearly all candidates make two particular mistakes, but I'll make sure that you don't.
If you have a presentation, even a rough draft, attach it (preferably as a PDF) and I will review it in advance. If you don't have a presentation yet, try to come with a few ideas - I'll make sure you choose the best one, and give you an outline to get started.
This is the most in-depth session I offer, because this is the interview where you either secure the offer, or you don't... let's make it happen for you.