Poster Design for an exhibition

We need a designer to design a poster for our company so we can print that to show in an exhibition. The poster is related to dental office services. We have 5-7 major services and we want to indicate each in the poster. The poster doesn't need to be very complicated. We have a website and you can contact us directly so we provide you the link. "Please provide sample of your graphic design work." Especially in poster design if available. Good English is a Must. We need you to work on the concept rather than just the coloring. The poster (10ft x 10ft) should grasp the attention of the visitors in a few seconds and deliver the message. We have a brochure ready and you can use the contents of that. We need 3D design (or at least shadowing) to make the design very elegant. You should be able to communicate and "TALK" via Skype or Google Talk. You may use "Stock Photos" in your design for each service we provide however you should combine and provide a unique collection of the images. You should be able to provide drafts and work on our comments to provide a final version ready to be printed (we will print the poster).