In 2006 he joined a band with Terry Butler (Death/Massacre/Six Feet Under), Sam Williams and Curtis Beeson called Denial Fiend which released their debut "They Rise" on October 16, 2007.

In 2009, Lee started the death metal band Bone Gnawer, with Rogga Johansson, Morgan Lie, and Ronnie Bjornstrom.

[5] Later that year, Lee and Johansson would form another death metal band called The Grotesquery, along with members Johan Berglund and Brynjar Helgetun.

[7] In 2012, he performed guest vocals on and contributed lyrics to Sigh's "Far Beneath the In-Between" on their album In Somniphobia.

His latest band is a blackened death metal project called Nattravnen, in collaboration with underground Swedish musician Jonny Pettersson, who premiered a demo track in September 2016, and released their first complete track "Suicidium, the Seductress of Death" in January 2018, with their first album Kult of the Raven to release on December 7, 2018.