He is the younger sibling of Masanori Mark Christianson, bass-player and multi-instrumentalist of the California indie rock bands Rogue Wave, Release The Sunbird, and The Heavenly States.

[9][10] On February 11, 2010, Christianson performed at the "To Haiti With Love" all-star musical jam at Boulevard 3 in Hollywood, CA, sharing the bill with other artists such as Common, Daniel Bedingfield, and Judith Hill.

[13] In 2010 Christianson joined indie rock band Rogue Wave for their North American tour promoting their fourth full-length album, Permalight, playing synthesizers and violin, and singing backup vocals.

[22] Ken continued his ongoing collaboration with choreographer Samantha Giron again for the performance of "Sex, Love, Money," a modern ballet shown at San Francisco's CounterPULSE theater on July 22 and 23, 2011.

[23] Critic Stephanie Echeveste of SF Weekly remarked, "The score by Ken Christianson was a delight, ranging from muted underwater explosions to trembling violins, glitchy electronic melodies, and pulsating beats.

[25][26][27][28][29] In March 2012, Ken contributed original compositions to NAACP Image Award winner Kenyetta Lethridge's play Innocent Flesh.