UI Developer for Drupal website

I am the project manager for building a Drupal based dynamic corporate website. We have an in-house graphic designer & Drupal developer who shall assist you on the job. We need a UI developer who shall translate mock designs from Photoshop to HTML & assist the Drupal developer to create the website. UI developer shall create prototypes and understand the previous ones along with provided references. A 6-week project (extendable) leading to the launch of the website into it's testing phase. The UI developer shall work towards adding new functionalities to the prototype and brainstorm with the Project Manager, further follow his guidelines to work on the project.