Producer, engineer and musician from the San Francisco Bay Area, California, now living in Portland, Oregon, USA. He works mostly with metal bands and is best known for production work, some bands he has produced are Neurosis, Swans, Melvins, Sleep, Brutal Truth, Buzzov•en, Fantômas, Agalloch, Cattle Decapitation, Mr. Bungle, Asunder and Red House Painters, Wounded Giant.