She competed in the women's duet event at the 2020 Summer Olympics held in Tokyo, Japan.

[2] This was also the first time Liechtenstein competed in artistic swimming at the Summer Olympics.

She represented Liechtenstein at the 2015 European Games held in Baku, Azerbaijan.

In 2016, Schierscher and Lara Mechnig competed in the duet technical routine at the 2016 European Aquatics Championships held in London, United Kingdom.

In 2018, Schierscher and Mechnig finished in 14th place in the duet technical routine at the European Aquatics Championships.