Mathis' first top result in World Cup was his third place in giant slalom in Bansko, Bulgaria, on February 18, 2012. He was in 26th place after the first run but had the fastest second run to attain the podium. It was also his first top twenty finish at the World Cup level.[1][2] He finished seventh the following week in Crans-Montana for his second top ten in as many weeks. A third success of this season came three weeks later in Schladming, where he attained the podium again with an excellent second run.[3]