Date of Birth: 
Place of Birth: Puławy, Lublin Voivodeship, Poland
About Mariusz Siembida
- Mariusz Siembida (born March 21, 1975 in Pulawy, Lubelskie) is a retired backstroke swimmer from Poland, who competed for his native country at two consecutive Summer Olympics, starting in 1996 (Atlanta, Georgia). A member of Lublinianki he is best known for winning the bronze medal at the 1997 European Swimming Championships in the men's 4×100 m medley relay, alongside Marek Krawczyk, Marcin Kaczmarek and Bartosz Kizierowski.
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