[1][2] Sinnaeve has also contributed to many albums and played live performances with George McCrae, Helix, Tom Cochrane & Red Rider, Kim Mitchell, The Partland Brothers, Lee Aaron, and The Guess Who.

[4][5] Sinnaeve and keyboardist Daryl Gutheil formed a band, Wascana, in Regina.

[6] The pair moved to Winnipeg and joined with Kenny Shields, calling themselves Witness Inc.; in 1977 the group became a full band, Streetheart, with the addition of guitarist Paul Dean and drummer Matt Frenette.

[7] Streetheart's most popular single, their 1979 disco-hybrid cover version of "Under My Thumb" by the Rolling Stones, achieved gold single status in Canada; the live version contains a blazing bass solo, performed by Sinnaeve.

After Streetheart broke up in 1983, Sinnaeve performed with the Partland Brothers and Red Rider.