Thank you, responders! I appreciate that, especially the STAR method. (Why don't they teach this in college?)

Also, noted about the jacket and shoes not sandals. I should've been on that.

Not sandals. Shoes.
Dress with jacket or skirt with jacket. You can always take off the jacket but it's good to start with one.

also, for outfits, a skirt is fine, but I generally prefer a professional dress, simpler/one piece, a bit neater looking, so if you have a work dress that might work. Otherwise a skirt is fine. Also depends on company culture.

I find in those situations doing research on everyone, their projects, etc, is important. Listening carefully is important (we focus so much on what we are saying that sometimes we fail to hear others); responding to questions with the star method (Situation, Task, Action, Result) which helps you stay focused and concise; having a list of thoughtful questions for the interviews. I would not use those questions to explore hours, schedule, work life balance; start date so much as big picture.

finally, try to figure out what you will say if someone asks you if you get the job, what would the first 90 days look like for you? Usually something like listen, observe and learn company culture at first, build relationships; then actively contribute to ongoing projects and begin to formulate templates for change/improvements/new projects, soliciting feedback as you go; then build consensus and strategies for implementation. obviously needs to be tailored to the role and what they are looking for (changemaker? continuity? new, fresh ideas but not radical change, etc)

I'm thrilled to have been invited to the final round of interviews for a Senior Staff position at a major local non-profit with a national reputation. I'll meet with the department that this position supervises, senior staff members, and relevant board members for a total of 2.5 hours.

This will be the largest-scale interview that I've ever participated in, and it will have the most people whose language I don't immediately share. (At my previous jobs, at smaller non-profit, I just interviewed with the CEO or department head, not finance, devo, etc.)

I'd love to hear tips, such as:
-Popular interview questions du jour
-Prepping advice. I'm already going to research the org and people I'll meet with, draft answers to questions I think I'll be asked, practice in front of a camera and a friend....Anything else you've found useful in staying calm, appealing, and on message?

-What to wear. I'm in my early 50s, 5'4", a little plump, chesty. I'll probably feel most comfortable in a skirt with low-heeled sandals (interview is early Sept.) What length skirt or cuts of blouse? I want to be professional but I've never been a suit kind of gal and I don't think this position calls for it.

Thanks in advance!