Jobs & Experts - Custom Styling for Jobs/Experts individual pages

Hi! I'd like to do custom styling for individual pages for each listed job or expert. Eg insert a custom header and footer, add links before the information for the individual job or expert. Is there a way to do that without digging into the .php files? Also, is there a way to do it so I don't lose my changes when there's an update to the plugin?

Thanks!