In 2006, Mark Harrington first released music from his alter-ego, Rubbernekkerz. He previously released 3 CDs under his own name before shifting focus to a somewhat more edgy, moody sound under the moniker Rubbernekkerz. Mark's voice has drawn comparisons to David Bowie, and Peter Murphy. One press article accurately described him as a "perennial and voluntary outsider".

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In the late 1980s, Mark played in the electronic rock trio Heik and the Shakes. Subsequently, he co-founded the Toronto Experimental Artists artist-run cassette label with filmmaker Ed Sinclair in 1988. He also formerly served as the Canadian correspondent for )ism(, a chapbook & writing distribution network. He has written bios for other musicians.