iPhone Scheduling App

We are looking for an experienced iPhone App developer to help us create an iPhone App that integrates with our online scheduling website. It would look like our web interface, and pull client information and schedule from the database so the user can access that data at all times. When they make changes in the app or add a new appointment that data is pushed back to the server. When a client requests an appointment via the website the request is pushed to the phone to inform the user and allow them to accept or reject the request. This is a high level overview of what we are looking for.