Along with Wayne Static, Campos was the only band member that had been a constant figure through the different Static-X lineup changes. Campos backed up with growling low vocals, and he sung the entire song "Anything But This" live. He performs vocals and bass for Asesino. He also joined Ministry after bassist Paul Raven died.
In 2001, Campos suffered a motorcycle accident, resulting in a broken collarbone, which caused him to miss most of the ongoing Static-X tour. He was temporarily replaced with Marty O'Brien. His stage name, "Maldito X", is Spanish for "Damned X".
In 2011 he joined the death metal band, Possessed, until 2012. He also joined Soulfly in 2011 as the official bass player.