In 1963, the band changed their name to Chad Allan and the Expressions after signing with Quality Records and releasing several singles that were minor hits in Canada.
In January 1965, Quality released the Chad Allan & the Expressions single "Shakin' All Over", a cover of the Johnny Kidd song.
Shortly before Cummings' arrival, the band dropped the name Chad Allan & the Expressions and began incorporating harder R&B material into their sets and became The Guess Who.
In the summer of 1968, producer Bob McMillan began recording tracks with Allan, Karen Marklinger & Corrine Cyca for CBC TV's lineup of music shows.
Allan was also chosen to play the lead character in a musical adaptation of the Old English poem Beowulf, which was released on album in 1974.
Allan co-composed the theme song for the 1976 children programming called Let's Go unrelated TV series of the same title.
In 1978, he released a compilation album called Shakin' All Over - it was distributed by a Greek label named Seagull and made in that country.
Allan appeared on a CBC special called It's Only Rock & Roll starring Ralph Benmergui, interviewing Neil Young, Burton Cummings and Randy Bachman in a 1987 reunion in Winnipeg.
In 2015, he was made a member of the Order of Manitoba "for his contributions to the Canadian music industry including the pivotal role he played in the creation of two legendary Winnipeg rock bands: The Guess Who and Bachman-Turner Overdrive.