He is a guitarist for black metal bands Mayhem and Nidingr, and fronts the eponymous electronic solo project Bergeton.

Nidingr released their first studio album, Sorrow Infinite and Darkness, in 2005 and Iversen left Gorgoroth that same year.

In 2006, he formed the black metal band Umoral and joined 1349, as a live guitarist, before departing the latter in 2007 and rejoining Gorgoroth.

[3][4] It was stated during the Gorgoroth name dispute that Iversen would be joining Gaahl and King ov Hell in the studio for their next album.

[11][2] In 2015, he composed the music for a production of the Bertolt Brecth stage play Mother Courage and Her Children at the Norwegian Theatre.