3D CAD design for 3D printing

I am looking for a 3D CAD designer to create a product prototype for 3D printing. The ideal candidate should have experience in creating 3D designs for 3D printing and be able to work with specific material requirements. The dimensions of the prototype should be medium-sized, between 5-12 inches. The designer should be able to work closely with me to ensure the final product meets my requirements and specifications.