In the User Management you can add and remove recruiters and manage users permissions. For example you can manage who can create job positions.
In the page you see all the users and their permissions. If needed you can hide individual job positions from certain user by clicking "Hidden positions" link in the user's row.
You can manage default permissions from "Show company default permissions"-link. There you can adjust what are the default permissions user will get when his/hers account is created.