From Halopedia, the Halo wiki
Mike Madeoy is an American actor and casting director. His career, which began in 1997, includes contributions to the Rugrats TV series, Mario Tennis, and Star Fox Assault.
Mike contributed his voice as Bisenti in Halo: Combat Evolved. Interestingly enough, another of his credits is Mario Golf 64, a game in which fellow Halo voice actors Mark Dias (Manuel Mendoza) and Jen Taylor (Cortana) also contributed. He was also a part of the game Agents of the Spirit: Episode I: The Phantom Influence, along with Chris Wicklund (Wallace A. Jenkins).