Calum began work in 1978 as an engineer on Alison Kinnaird's album Harp Key. Since then he has worked as either Producer, Engineer, Mixer or even Keyboard/Vocal musician for (in alpha order) Alastair McDonald, Anam, Blue Nile, Botany 5, Boys of the Lough, Brian McNeill, Capercaillie, Carol Kidd, Claire Martin, Clannad, David Newton, Headboys, It's Immaterial, Josef K, Lost Soul Band, Máire Brennan, Mike Lindup, Nazareth, Orange Juice, Prefab Sprout, Restricted Code, Runrig, Simple Minds, Stephane Grappelli, The Go-Betweens, The Happy Family, The Silencers, Tom Anderson, Tommy Smith, Wet Wet Wet and William Jackson.

There's a video interview on-line.