Creative Product 3D Rendering and Design

We are looking for a product designer to take a preexisting item that we already have, and edit it, adding physical features and things that will aesthetically change the appearance of the item. You will be provided photos of the already existing item, and some ideas we have, and asked to create a 3D design and rendering.
We are looking for assistance in designing other creative designs. This will be a working and collaborative relationship and the person we work with needs to be creative and have experience with product development and design.