Foundry: I have a very ghetto one
Machine shop: Allmost finished with mine (Big time CNC guy)
Engineering team: Why? I know allot about engineering( Planing to go to school for it)
Attorney: Shouldn't need one, but i know one...

So let me get this straight...
You have a foundry that can die cast 12" diameter (one example) metallic rotors, including meltdown operation...and/or can cut solid metal appropriately?
A CNC machine? Why do I have a feeling we're talking 3D printer here. And there's no siren that can be 3D printed (given 3D printers print in plastic) without flying apart from the forces sirens create.
How old are you? I'm strongly suspect you lack a comprehension of advanced mechanical and acoustic engineering concepts (I'm sorry, that sounds really harsh, but if you're as young as your posting habits suggest then I can tell you that you haven't even had enough physics and calculus to begin to comprehend even moderate engineering concepts, let alone the advanced ones needed to properly design a working siren).
Attorney: I would imagine you would want someone to aid you in getting your design through regulatory approval and maybe even patented.
Look, I know I'm this all sounds very harsh, but you need to realize you have a lot of growing and learning to do yet. The arrogance you are displaying will hinder that learning and growing dramatically.