i agree that an employer or applicant should be able to add a link into their job description or resume description.
but what you don’t want is that an employer / applicant can see a list of all the website owner’s pages such as contact page, job list page, blog page and so on and link to them. this should only be accessible to administrators, editors and so forth.
what is happening at the moment is that your template uses the core functionality of the create a link button within the visual editor.
to test it login as an employer or applicant and add a link into any of your description textareas. you should see that wordpress visual editor offers you a complete list of all your created pages within your website.