What should I talk or ask about in a 1:1 with the director of my org?

It's great that you already recognize that it's an unique opportunity for you!

I also was constantly learning from such events. Here is a list of my favorite questions (just for the inspiration):

1. What are the top priority issues in your Org I can help with?
2. Is there anything about my teams that you want to understand better?
3. How would you describe the ideal engineer 1 level above me?
4. What advices will you give to yourself at my point of your career?

But overall please consider using your own ones, since it depends on the exact goals you want to achieve for yourself.

On top of the excellent recommendations from Igor, I recommend these Taro discussions as well:

• "Topics to talk in 1:1 with skip level manager?"
• How To Effectively Leverage Skip Level 1:1s

Also, given that Rubrik is a pre-IPO company, you might want to ask about how that's going and what their perception is of the company's financial outlook, especially in this current economic climate.