Paul Eiding (born March 28, 1957) is an American voice actor. He is perhaps best-known to video game enthusiasts as the voice of Colonel Roy Campbell in the Metal Gear Solid video game franchise. He can also be heard as Grandpa Max Tennyson on the popular Cartoon Network series Ben 10 and its various spin-offs prior to the 2016 reboot, when David Kaye took over the role. Aside from Max, Eiding has voiced other characters in the Ben 10 franchise, including Eye Guy and Liam in Omniverse amongst a whole menagerie of extras.