Alex Perialas is an American audio engineer, mixer, and record producer, best known for his extensive work during the "golden age" of thrash metal in the mid-1980s to early 1990s. Having worked with many of the genre's top acts, including Overkill, Testament, Anthrax, Nuclear Assault, S.O.D., and Flotsam & Jetsam, Perialas later went on to work with hardcore punk band Bad Religion, groove metal band Pro-Pain and hip-hop/rock band Such A Surge.