Kerschbaummayr represented the Czech republic at the 2016 World Single Distance Speed Skating Championships in the team pursuit event and again at the 2019 World Single Distance Speed Skating Championships in the mass start event. She participated at the 2018 World Allround Speed Skating Championships, finishing 21st overall. She participated at the 2018 European Speed Skating Championships in five events. She also competed at other international competitions, including at ISU Speed Skating World Cups. As of the 2020/2021 season, Kerschbaummayr represents Austria.