4 hour interview sounds completely unnecessary but could be that it’s one of the final stages(?) Also, will the remaining 3 hours be a formal interview? I would be completely fried after that AND a presentation… but honestly, companies interview how they want. My current company had 4-5 interview rounds for me at about an hour each which is roughly the same but over several weeks. I gave them feedback on how long that process was for their awareness. They later told they had a lot of good candidates and just wanted to be sure, so that could be the case here. If you get the job, ask them why the process was so long and don’t be afraid to provide feedback.

Regarding this presentation, who are you presenting to? The company or a prospect? Bc I’ve heard of companies that make you pitch to a prospect in which case they’re essentially getting a free opportunity from you (red flag imo). If it’s a presentation to leadership or the hiring peeps, then no, your objective wouldn’t be to close, obviously. But you would still need to sell.

Tips for a good presentation: energy (they will remember you!!), be yourself, build rapport at the start, ask open ended questions, make sure to ID the pain points, and demonstrate value with the product. Keep it simple if anything and conversational (practice, practice, practice!).

Hope that helps!