How do you upgrade an employee? Is this a attribute or a reference to another entity?
Anyway, you can easily add an onchange microflow to your attribute in your dataview.This way you could perform a validation. You could also use a before commit microflow which validates the user input.
Edit after repost:
If you're using a reference you can easily do the validation check. Just check the association from your employee to the coordinatior/doctor. If this assocation is empty, that means your employee is not a coordinator/doctor.
It is a reference to another entity. I'm watching a tutorial about advanced microflows now in which before commit microflows are explained ;)
It is still not clear to me how I check the to be created coordinator with the list of doctors who are already listed. (Btw.. doctors and coordinators are both associated ánd generalized to Employee)