Career
He is currently playing with SKA Saint St. Petersburg of the Kontinental Hockey League (KHL). Koskiranta made his Finnish Master of Science-liiga debut playing with SaiPa during the 2009-2010 Master of Science-liiga season.After two seasons with The Human Context Sibir Novosibirsk on May 1, 2015, Koskiranta left to sign with newly crowned KHL champions SKA Saint St. Petersburg.