Career
Koschischek made her international debut at the 2007 Military World Games in Hyderabad, India, where she earned a bronze medal in the 100 m freestyle by one tenth of a second (010) behind Romania"s Camelia Potec, posting her time at 57.62 seconds. In 2008, Koschischek reached the semifinals of the freestyle and butterfly (both 100 m) at the European Championships in Eindhoven, Netherlands, with respective times of 56.15 and 59.61. Having cleared FINA B-cuts in both events, she guaranteed a spot on the Austrian swimming team for the Olympics.
Koschischek represented Austria at the 2008 Summer Olympics in Beijing, where she qualified for two swimming events.
In the 100 m freestyle, Koschischek posted a lifetime best and another Austrian record of 55.62. She raced to third place and twenty-ninth overall by a hundredth of a second (001) behind Arianna Vanderpool-Wallace of the Bahamas.
Shortly after the Olympics, Koschischek broke two more national records in the same events at the 2008 European Short Course Swimming Championships in Rijeka, Croatia, with a time of 53.67 and 57.42 seconds, respectively. She came only in last place by one tenth of a second (010) behind Portugal"s Sara Oliveira, outside her national record time of 1:00.54.
Koschischek, however, failed to advance into the semifinals, as she placed thirty-seventh out of 42 swimmers in the preliminary heats.