Well, their belief statement requires affirmation of the de novo creation of Adam and Eve. At that time, this required rejecting evolutionary science. They also are not YEC, but OEC. So the pool of biologists that could even be hired was exceedingly small.
Now it is more widely known that the de novo creation of Adam and Eve can be consistent with evolution. So that substantially widens their pool.
The bigger question they face as an institution is whether or not they require scientists they hire to sign on to ID. If so, they need to be upfront and transparent about this. That sort of belief test would also raise questions about academic freedom.