Glen returned to Winnipeg where he was invited to teach
music at Yamaha's head music school. He also helped put together a jazz quartet, The Whole Life Communication Orchestra, with bassist Ian Gardiner (Mood Jga Jga, Burton Cummings), drummer Jim Hillman (Sonny Greenwich, Oliver Jones, Merlin Factor), and pianist Mark Rutherford (Diane Heatherington). Rutherford also included him in his nine piece Jazz Composers Workshop. In 1976 he went to Darmstadt,Germany to study with Gyorgy Ligeti, Mauricio Kagel, Rolf Gelhaar, and Giuseppi Sinopoli. Hall co-founded the jazz-rock group, Zdenka, whose pyrotechnical compositions and performances became highly regarded After recording one as yet unreleased album, the group reconfigured and Hall decided to concentrate on jazz playing and composing.
In 1979 he recorded his first album, The Book of the Heart, with pianist JoAnne Brackeen, drummer Billy Hart, bassist Cecil McBee and longtime friend from his Berklee days, guitarist Joshua Breakstone, and released it on his own label, Sonora. The Book of the Heart (InRespect; Koch Jazz), perhaps the first independently produced and released album by a Canadian jazz musician to be recorded in the U.S. and to utilize internationally renown jazz stars. After its release, Glen traveled for six months in Asia and the Middle East.Upon returning to Canada, he married and moved to Toronto where he hoped to develop his musical career.
In Toronto Hall mixed with the who's who of the jazz scene: drummers Claude Ranger and Terry Clarke, bassists Don Thompson and Dave Young, guitarists Ed Bickert and Rob Piltch and many others. In 1984 he began work on his second recording, The Mother of the Book (InRespect; Koch Jazz), featuring legendary arranger/composer Gil Evans and the percussion group, Nexus.
A work of extraordinary depth and richness, Jazz Forum said Hall's compositions are "surely of timeless worth" and Jazz Times noted that "it features one of the most singular ensembles ever assembled, the most thoroughly post-modern jazz album cutting across the expected." In 1987 Glen put together Left Hand/Right Hand, an octet that was to play Gil Evans' arrangements of Hall's compositions. Later the music was to be recorded with Evans band featuring drummer Elvin Jones and soprano saxist Steve Lacy. Evans' death ended this plan, but Hall kept the group together for eight years, playing only sporadically due to its inherent financial drawbacks. Hall had resumed his academic career in 1985 teaching communications, mystical literature, psychology, which he continues up to the present.