Might seem a dumb question but what trade would one hire to install a
floor drain in a basement? Plumber is the obvious guess, but it would
involve concrete work too, no? Especially getting the slope right?
What about a "wet basement guy"?

We have upper and lower basements. Lower has a floor drain, upper
does not, but upper does have rough in for bathroom. Seems to me
that any basement should have a floor drain.

Thanks.