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As a member of the German 5000 metre relay team, he finished 3rd in the semifinal and 2nd in the B Final, ending up 5th overall.
As a member of the German 5000 metre relay team, he finished 3rd in the semifinal and 2nd in the B Final, ending up 5th overall.
Seifert competed at the 2010 Winter Olympics for Germany. In the 500 metres, he placed third in his round one heat, failing to advance. In the 500 metres, he finished 18th overall.
His best individual performance at a World Championships was in 2012, when he came 4th in the 500 metres.
As of 2013, Seifert has two International Skating Union Short Track Speed Skating World Cup victories, one as part of the relay team in 2010-2011 at Dresden, and in the 500 metres at Nagoya in 2012-2013. His top World Cup ranking is 5th, in the 500 metres in 2012-2013.