Marko-Varga has been involved in two relay bronze medals at the Short Course World Championships, the 4 × 100 m freestyle relay in Shanghai 2006 and the 4 × 200 m freestyle relay at the 2004 Indianapolis championships. She has also earned two relay bronze medals at the European Championships, 4 × 200 m freestyle relay in Berlin 2002 and 4 × 100 m freestyle relay in Eindhoven 2008.