Try typing a few letters of the employee's name to filter the list of possible recruiters (limited by default at 10 items).  If the employee's name is still not showing in the list, it may be for two reasons: 


1. That person is not registered in INES --> check if the person has received the invitation link and if not invite them again, and then verify them 


2. That person has registered but has not been verified --> check "My Employee's positions" and verify that person