If I’m understanding your question properly, you are looking for templates. Copy your single.php or page.php from your theme and then rename it to single-career-finders.php.
This is the same thing you should have done for your archive page as well… Take the archive.php file from your theme, copy it and rename to archive-career-finders.php. It will have the appropriate query within it to pull your custom posts but you can alter the content as well. You don’t have to add a separate WP_Query here.
Now edit this file and you’ll have a custom presentation for your data separate from normal pages, posts, or other CPTs.
This page has a great explanation of how templates work within WordPress:
https://developer.wordpress.org/themes/basics/template-hierarchy/