product engineer to design and test a physical product

I am looking for a product engineer to design and test a physical product. The product is a construction hard hat, and I have specific requirements for it that I need to be met. I also require any advice and suggestions from the engineer on how to best proceed. It is essential that the design and testing of this product is completed within 3 months. The engineer must have experience in designing and testing physical products as well as knowledge in the necessary safety regulations. If you feel you are able to meet the requirements of this job then please apply.