 Prominent in the Australian jazz scene throughout the 1970s, 80s and 90s, Mark Simmonds also worked in many other musical settings such as soul, funk groups The Dynamic Hepnotics (1985–1986), Jackie Orszaczky's "Jump Back Jack", and also contemporary music groups such as Phil Treloar's "Feeling to Thought", PipeLine and The Umbrellas.In addition to these, the Australian Rock database lists Simmonds as a member of Drain, Corroboree, Chris Turner Band, Silver Studs, Keys Orchestra, Moonlight, Ol' 55, Bentley's Boogie Band, and Renee Geyer Band.Simmonds led his own groups, mostly under the name of "The Freeboppers".