Mechanical design

I am looking for an experienced mechanical designer to create a design for a product intended for commercial use. I don't have any specific requirements but need some guidance as I'm not an expert in this area. The design should be for product or machine components, and needs to be suitable for a commercial setting. The completed project should be able to be 3D printed in a variety of shapes or assembled from separate components. Whoever takes on this project should have experience in designing products for commercial use and have strong knowledge of the software and tools frequently used in mechanical design. Please let me know if you have any questions.