It’s not so simple. There’s a difference between requiring them to work on Shabbos, and someone choosing to. For example, if you own a store, you can’t make non-Jews open it on Shabbos for you, because you’re requiring them to work. However, let’s say you ask an employee to do some research on a product for you. On Shabbos, he decides, on his own, to do some work from his home computer. You didn’t ask him to do it then. He could have done it on Friday, or on Sunday, if he wanted. That might be ok.
Ask your Rabbi, you won’t get a real psak here.