Changing parent page to a single Help!

I have a parent page called 'Employment' that is a structure - it has 8 sub pages beneath it. I have just created a new single template and would like this to replace this page - is this possible? 

Would really appreciate the help!
As a more detailed reply to your comment:
You don't need to create a completely new section in order to have a different template. For Example when you create a section called 'Employment' you can have several different entryTypes in this section. In your /admin/settings/sectionsyou can see all your sections (left) and when you click on their entryTypes on the right you'll enter this page /admin/settings/sections/&lt;sectionId&gt;/entrytypes to edit them.

With the following folder structure you can do this:
|-/templates
|--/pages
|---_entry.twig
|---/entryTypes
|----imprint.twig
|----contact.twig
for example your section is called pages and you have the entryTypes imprint and contact.

Your section template is /pages/_entry.twig

{% extends [
    'pages/_entrytypes/' ~ entry.type ~ '.twig'
] %}


so depending on your entryType the template for imprint or contact will be rendered.

In your case you would create a folder Employment and create different entryTypes for the different templates you want to render. In your Employment you render the template depending on your need.
You can also extend your file to

{% extends [
    'pages/_custom/' ~ entry.slug ~ '.twig',
    'pages/_custom/' ~ entry.someCustomFieldValue ~ '.twig',
    'pages/_entrytypes/' ~ entry.type ~ '.twig',
    'pages/_generic.twig'
] %}


so you can choose you template via slug/dropdown lists/checkboxes or whatever you want