JR, Graupner, Multiplex, and other RC manufacturers have company-sponsored teams. I don't know the economics involved or whether team members are fully supported, but perhaps that is what the OP had in mind.
In any case, it is a tough road to pursue, and the chance of success, as mentioned above, is slim. A more likely route is to develop a name in some part of model RC aeronautics, and then sell endorsements to the manufacturers. Or, in the case of some engineers, help companies develop new products. Real Flight had considerable input from a well know model engineer.
John