[6] He has also been a member of synth-pop band Apoptygma Berzerk, touring member of Satyricon and Celtic Frost, and appeared as a guest with several different bands, including The Young Gods and Ministry.

He formed Magenta in 1995 as an outlet for other musical ideas than death metal.

He co-founded the short-lived heavy metal super group Doctor Midnight & The Mercy Cult in 2009.

Following Jansen's death in December 2014, ORDER recruited former-Gluecifer member Stu Manx in August 2015 and released their debut album in 2017.

He is the founder of the music business seminar IMC, which is held during the annual Inferno Festival in Oslo, Norway.