Thank you for asking.
To make the single employee layout becomes full width, try to apply the following CSS code through the Simple Custom CSS plugin or child theme’s style.css
The code above will be applied globally. To assign on a specific employees single post page, you can add post ID class name. So the code will look like
To find the ID, go edit your employee. Then take a look at the browser’s address bar. You will see something like
From the URL above, the ID is: 30
I hope this reply helps.