One of the most well-known employees of Blizzard Entertainment.
He's worked at Blizzard as a voice actor. The first game I remember him from was Warcraft, where he did the voices for human faction. In Warcraft II he was the voice for human footmen (and also "sang" the I'm a Medieval Man song =)... Legendary voice, indeed.
In recent years, he's also been on the production side, and is also frequentedly interviewed about Blizzard's new games.
He was one of the producers of Starcraft and senior producer of Diablo II (in both of which he also appeared as a voice actor... in Diablo II as Diablo himself! =) He's also does voice work in Warcraft III, but I'm not sure which role. (The footmen sure sound different in this game...)