Fitflop have a range of "back to work" shoes. Some ballet flats, some loafer type, and some more probably associated with healthcare (clog/open backs etc). Fitflops are so comfy, wear well and help your posture. Just my opinion.
When I was in full time teaching I bought all of my shoes from New Look! Don’t know what it is but they’re just made to be stood in all day, even the heels!