Firstly, he was only a session member on gigs, but after that he joined the band officially.

During the recording of their first album, some session members were invited to play cello and saxophone.

He was in Satyricon for two years as session member.

Jim Austin drums (as a session member, since he had at this point officially left the band)

Hielm officially joined the band in January 1998 after more than two years as a session member.

The governor was present while the address was read to the session members by the governor's son, Alfred.

Fabiano Biagini would return for some concerts as a session member.

Over the years, Old Man's Child has become a one-man band with the addition of session members on albums.

However, he agreed to record his bass parts for the album as a session member.

He was also a session member in Negative.