Wallner took part in FIS races from December 2009 at the age of 15 . In February 2011 she was a participant in the European Youth Olympic Winter Festival in Liberec , where she was 10th in slalom and 11th in giant slalom. On February 10, 2012, she started a European Cup race for the first time in Bad Wiessee . She won the first point at this level on November 26, 2012 at the slalom in Vemdalen , and three weeks later the first top 10 classification at the Courchevel slalom . At the end of March 2013, she became the German runner-up junior downhill champion . Wallner made her debut in the World Cup on November 16, 2013 at the slalom in Levi ; with the high starting number 63, she finished 16th and immediately scored her first World Cup points. At the Junior World Championships in 2014 she won three bronze medals in slalom, team competition and super combined.
In the 2014/15 World Cup season, Wallner did not have a single countable result, as she was either eliminated or did not qualify for the second round. In November 2015 she suffered a cruciate ligament tear in her right knee while training and had to take a break for the entire winter. During the 2016/17 season, it gradually moved closer to the world's best and achieved two top 10 results in March 2017.
On November 22, 2018, she suffered another cruciate ligament rupture during slalom training.
Germany
