PHP, MySQL, jQuery and AJAX project

We need some help developing a work order application. It will have a client interface so they can create work requests and view job status. On the admin side the admin(s) and create a work order, add multiple job request from customer to the same work order and the print out a PDF version. This will then update the job status for the customer so they know it is in progress. nce the job is completed, the work order will be given back to an admin so they can enter the job information into the system and then close out the work order. The client will then see the status as completed, be able to view the finished work order. This is a basic overview only.. It is a bit more detailed than the above. We are using a themeforest template for the interface which is jquery. We want to use AJAX for post backs so as not to have page refreshes.