Creation of discussion section/forum for our professional membership website WordPress

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Creation of discussion section/forum for our professional membership website (WordPress)
Our website ([login to view URL]) is a professional membership site for certain types of medical providers in the healthcare space. We are a non-profit organization.
We are looking for a developer to build out our discussion section/forum. Able to use a plugin, but will need customizations to look and feel how we want. Modeled fairly close to how Yahoo has its discussion section looks. Only members are able to enter the Discussion section/forum--thats set up on the site already--so everyone is able to post and comment and we will know their name, role, organization, photo (if they have one in their profile), etc.
See attached designs for how the page should look and function.
Required functionality is basically like any discussion page:
-Ability to reply to comments and branch/indent properly
-Time stamp post
-Edit or delete post (maybe expires after 24 hours)
-Like posts (once only)

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