Alexander Gassner at the German Skeleton Championships 2018/19 in Altenberg
Alexander Gassner's family emigrated to Germany when he was three years old. At the German Championship in 2007 he was able to draw attention to himself for the first time when he finished sixth. The athlete from BSC Winterberg qualified for the European Skeleton Cup team for the 2007/08 season. Gassner won the race on his very first outing in Igls . Overall, he won four of the six races and also took first place in the overall standings. At the Junior World Championships in 2008 he won the bronze medal behind Alexander Tretyakov and David Swift .
For the following season Gassner qualified for the higher-class Skeleton Intercontinental Cup . In Igls he won a race of the series and finished third in the overall standings behind Michi Halilovic and Chris Type . At the Junior World Championships he won bronze again, this time behind Sandro Stielicke and David Lingmann . In the following season he again finished third in the final ranking of the Intercontinental Cup, this time behind Chris Type and Matthew Antoine . In January 2010 he was Junior World Champion in St. Moritz ahead of Alexander Kröckel and David Lingmann. In the 2010/11 Intercontinental Cup , Gassner was second overall behind David Lingmann. At the Junior World Championships in 2011 he won his third bronze medal when Alexander Kröckel won. He then started in the Skeleton World Cup 2011/12 , in which he finished seven of eight races of the season in the top ten and finished sixth in the overall standings. At the end of 2011 he won his first title at German championships ; at the 2012 World Cup he was seventh.
The following year Gassner returned to the Intercontinental Cup and won the 2012/13 overall ranking ahead of Axel Jungk and Dave Greszczyszyn . In the winter of 2013/14 he took part in five of eight World Cup races, with his best placings being two eighth places and 18th place overall. In addition, he contested four of eight Intercontinental Cup races, finished all of them in the top four and finished twelfth in the final ranking. At the beginning of the 2014/15 season, he was unable to meet the starting standard required by the BSD and thus could not take part in the qualifying races for the international racing series. At the German Championships in 2015 , however, he won his second national championship title. In the winter of 2015/16 he returned to international competitions and initially achieved a victory and a second place in the Intercontinental Cup .