From 1992 to 2010, he was the lead guitarist for stoner rock band Monster Magnet, contributing to eight albums in total.

Mundell founded New Jersey stoner band The Atomic Bitchwax as a side project in order to keep playing in between Monster Magnet touring.

In 2011, it was announced that Mundell had formed a new project, "The Ultra Electric Mega Galactic" (UEMG).

Mundell is currently working on a third The Ultra Electra Mega Galactic Album and actively contributes to various recordings and soundtracks as a studio musician in Los Angeles.

Recent recordings with Desert stoner rock Val Chillmore and the band Volume.