Joerg has competed in the Paralympics on four occasions. His first was in Barcelona in 1992, where he won gold in the shot put and silver in the javelin. His next appearance was in 1996 where he won silver in the shot put. He also competed in the pentathlon and javelin. In 2000 he reverted to competing in the javelin and shot put, winning bronze medals in both events. His final appearance was in the 2004 Summer Paralympics where he only competed in the shot put and was unable to finish among the medals.