 Markku Koski akaberekwa musi wa15 Gumiguru 1981 inyanzvi yekumhanya pamhenderekedzo dzegungwa kubva kuSievi, Finland. Iye anozivikanwa mukati memusangano we snowboarding nekuda kwekuratidzira kwake kusingachinjiki mumakwikwi ehafu-pombi uye nezvikamu zvake zvevhidhiyo neStandard Mafirimu. Koski akahwina menduru yendarira pa2006 Winter Olympics mumakwikwi eHalfpipe, uye akahwina menduru yegoridhe mumakwikwi eBig Air pa2009 Snowboard World Championships. 