 At the 1998 Games in Nagano he won two golds and one individual silver, and a silver with the German relay team.At the 2002 Winter Paralympics in Salt Lake City Oelsner won gold in the 7.5 km biathlon and the 5 km classic cross country.However, he would go on to become the first athlete to be sent home from a Winter Paralympic Games for failing a drug test when he tested positive for the steroid methenolone.