Should moje be accepted here as well as moi - what if the employees are all women?
That would be either moje pracownice or moje pracowniczki, and while there's no context to draw such conclusions from, I guess those options should be accepted.
Ah, I didn't realise pracownicy is male plural as well - never mind.
The forms for groups of male people and mixed groups of people will always be the same.
I gave "Moje pracownice dobrze pracują" and it was not accepted?
Added, along with variant for "pracowniczki".