Concurrently, the original lineup of Terrorizer was dissolved after the departures of Sandoval and guitarist Jesse Pintado (who subsequently joined Napalm Death).

He had to practice frequently in order to get his feet up to speed, and recorded the Altars of Madness album within only a couple of months of joining Morbid Angel.

"[4] After mastering the double-bass technique in Morbid Angel, Sandoval also implemented it in Terrorizer's World Downfall album when the band briefly re-united to record it.

Not being able to play painlessly for an extended period for up to a year, he was replaced by Tim Yeung for the recording and touring of Morbid Angel's 2011 album Illud Divinum Insanus.

He also mentioned that after the recording of Terrorizer's 2012 album Hordes of Zombies was when he converted to Christianity and his life started to change, crediting his mother and sister for their encouragement.