M.G.
I wore a suit when I didn't know what I was walking into. However it was soft material so not stuffy and a bright (blue cobalt) shirt underneath so vibrant.
When recruited for a job by people I knew, or I knew about the position, I'd wear something more casual - like nice pants and a jacket. It's still a put together look (think like a blazer) but it's not so formal (like the pieces didn't go together as a suit).
If you don't know, I'd err on the side of caution and dress up.
Oh! and good luck :) hope you get it!