Mechanical engineer required for schematics of earphone and charger

New startup trying to build a brand based around a product, we have a concept design of the outer shell and features that we want to integrate. We’re looking for someone to help us bring the design to life and help with the designing of the outer mechanics of the system and its features. If you have electrical engineering experience as well then we can also talk about bringing you on board for the second half of the project (Product is a Bone Conduction earphone and a charging case)