Informational Interview with MBB employee (not consultant)

Hello everyone, I have a phone informational this week with an MBB employee (they are not on consulting track which is what I want to do, but they are very high in their field). I’ve had several successful info interviews previously with people in jobs I am interested in, but this person and I have a close mutual contact and they kindly offered to chat. Besides asking about the MBB culture, what should I ask about? I know I should let the contact do most of the talking and I’d like to have some good questions prepared, but as the contact is/was not a consultant I’m unsure of exactly what I should be asking.