Ilsanker began his career in the youth squad of 1. Halleiner SK. He first played as goalkeeper but soon changed to the midfield. In 2005 he signed with Red Bull Salzburg, where he played in the "Red Bull Juniors" team. On April 4, 2009, he was in the squad of the first team for a league game. His first game for Red Bull Salzburg was a national cup match on August 15, 2009. On August 25, 2009, he played his first international game for Red Bull Salzburg in the UEFA Champions League qualifier against Maccabi Haifa.