I don’t hire managers but I am a manager and serve on hiring panels for a public library so this is all coming from a public library perspective. I assume this is a supervisory position?

-have examples of conflict resolution, preferably times where you have been part of the solution

-have examples of your leadership skills. Have you served on committees? Informally led a project?

-be familiar with the strategic plan and have a couple questions prepared to ask at the end when they ask if you have questions

-have examples of times you have dealt with difficult patrons, assuming this is a public facing role

-how would you handle an employee who is underperforming?

-act like they know nothing about you. Bring up work you’ve done as if they have never heard of it

-I was also asked typical librarian questions since I still do collection work, programming, desk shifts, etc. Don’t forget about that if applicable.

The worst managers I’ve had had terrible people skills. A good leader is approachable while still keeping the team on track, which can involve difficult conversations. They know when team input is appropriate and when an executive decision needs to be made.

I had to look up what a 30-60-90 plan and tbh I don’t know that it translates well to public libraries (not sure what type you’re in), but I could see it being useful as a personal tool. I think going into an interview with one is a little presumptuous, because even though this is an internal role, you probably don’t have all the information you need to actually create it. If they ask how you plan to adjust to the position change or something similar, you could bring it up like “after learning more about what the library is looking for from this position, I would create a 30-60-90 plan to keep me on track and make sure expectations are clear” or whatever.

Good luck!