[J-dawg]

I wonder how long before a self-appointed member of the language police tells you off for using the word "females"

[LandR]

I can't keep up with what words you should and shouldn't use but "females" in this context does sound a bit odd.

I wouldn't ask how many males do you work with, I would just way "how many men do you work with."

Similarly, I would say "How many women do you work with?"

But maybe that's an issue as well. I don't know. This language policing is mostly a minefield I don't care to navigate. The OP clearly wasn't trying to be offensive or anything like that, so i think (and hope) it's fine.