Paul Eiding

From the Metal Gear Wiki

Paul Eiding is an American voice actor. Aside from his contributions to Metal Gear Solid, he is also known for the roles of Perceptor, the Autobot scientist in Transformers, Judicator Aldaris in Starcraft, Max Tennyson in Ben 10, and various roles in Cow and Chicken.

He is best known to Metal Gear fans as portraying Roy Campbell.