Career
He plays in the second-row. He is the brother of Alan Schirnack. Schirnack played his first football with Te Aroha Eels before becoming a Newcastle Knights junior.
Schirnack made his first-grade with the Wests Tigers in round 2 of the 2010 season.
lieutenant was his only appearance for the season, partly due to a lengthy injury. Returning to the NSW Cup with Balmain Ryde-Eastwood, Schirnack was involved in an incident where a piece of his ear was bitten off during a scuffle with an opposing player.
Near the start of the 2011 season, Schirnack made another 2 appearances from the bench, which were to be his last for the Wests Tigers club He signed with the North Queensland Cowboys in October 2011, and played for their feeder team the Mackay Cutters in 2012.
Early 2015, Jason signed with the Canterbury Bankstown Bulldogs to play in their NSW Cup side.