His particularly notable musical associations have been with the Cameo Blues Band, the Lincolns, Richard "Hock" Walsh and Alannah Myles.
[citation needed] In 1977 he moved to Toronto to work at the second location of Steve's Music Store and left performing for a while.
Markman joined the Cameo Blues Band with Malcolm Tomlinson in 1982 and later toured with the Lincolns, opening for Robert Palmer.
Markman returned to Toronto and played with the Alannah Myles Band, Tom Barlow and the late Richard "Hock" Walsh.
His recording credits include Rosenshontz (It's the Truth), Michael Vincent (Home in the Forest), Tapestry (I Need Your Lovin') and Ron Wiseman (Mystical Mood).