Some of the early bands he played with were The Proones, The Livin End, and Thee Exceptions.

In 1968 he formed the psychedelic rock band Blue Toad Flax with Tom Trefethen playing organ and singing lead vocals.

[1] In 1970 he formed the progressive rock band Ambrosia with David Pack, Joe Puerta and Burleigh Drummond.

[3][4] North and the other members of Ambrosia contributed to the album Tales of Mystery and Imagination by The Alan Parsons Project.

[6] In 2014 North played on the song "The Soft Parade" from Light My Fire: A Classic Rock Salute to The Doors.