truss bracket engineered

I'm in need of an experienced engineer to design a truss bracket for me. The desired material for the bracket is steel and it also requires certification from an engineer. The maximum load the bracket should support is less than 500 pounds. If you have the expertise needed for this project, I'd be thrilled to hear from you. I'm expecting to receive a quality and certified product, suitable for no less than 500 pounds. Thank you in advance for considering my proposal.
The truss brackets that need engineering will sit on top of a 40x20 container.