In 2005 Jeremy joined the band Helmet to play bass, but left in September 2006.

[1] With the band Helmet he replaced Frank Bello on the Size Matters tour.

He rejoined the band for the Warped Tour in support of Monochrome; however, he did not appear on the album because of prior commitments while it was being recorded.

Chatelain left the band in September 2006, along with fellow members Chris Traynor and Mike Jost.

Chatelain also played guitar in Salt Lake City's hardcore straight-edge band Insight in the early 1990s and provided vocals for the first 5-member lineup of Iceburn.