Education
He finished in eighth place at the 1986 European Championships in Stuttgart, West Germany.
He finished in eighth place at the 1986 European Championships in Stuttgart, West Germany.
His best marathon time is 2:09:41, which he ran on October 28, 1990 in the Chicago Marathon. He finished in second place with a margin of less than one second between him and Martin Pitayo. Niemczak tested positive for the anabolic steroid Nandrolone after finishing second at the 1986 New York City Marathon and was subsequently handed a two-year ban from sport.