Merging two websites

General information for the website: Videography.ie provides services within professional video and photography fields
Description of requirements/features: The current website Videography.ie is being revamped to a new design using Wordpress, the temp URL is Videography.ie/web-new2


I would like to see would it be possible to merge the current website with the new Wordpress website?

So the front end becomes the Wordpress site but also keeping the current website's content and functionality under same domain Videography.ie, so it is like joining the two.
Extra notes: Payment is flexible, depending on scale of the job that needs to be done. The proposals should include a brief of how the developer will approach or do the job.