Active since 1988, Forrest is best known for playing in a number of metal bands, including Voivod, E-Force, and Project Failing Flesh.

During the late 1980s and early 1990s, Forrest was a member of the bands Liquid Indian and Thunder Circus.

In 2003 he formed the band Project: Failing Flesh in Vienna, Virginia, which released three albums up to 2012.

[3][4] In 2017, Forrest conducted a European tour in which he performed songs from the Negatron and Phobos albums by Voivod.

[9] In 2021 the band signed with the Danish label Mighty Music:[10] Mindbender was released on September 19, 2021.