Career
She represents Saskatchewan Triton. Marko-Varga was an early prospect, winning two individual freestyle titles at the 1998 Swedish Swimming Championships at the age of 13. The winning marks were 2:03.95 on 200-metre freestyle and 4:21.41 on the 400 m freestyle.
At the Athens 2004 Olympic Games she swam in the 4 × 200 m freestyle relay (with Josefin Lillhage, Malin Svahnström and Lotta Wänberg), finishing 8th in the final.
At the 2008 Summer Olympics she competed in individually 200 m freestyle and in the 4 × 100 m freestyle and the 4 × 200 m freestyle. She finished 16th individually and 8th with 4×200 relay team
The 4 × 100 m freestyle team didn"t make the finals finishing 11th in the prelims. 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.
Saskatchewan Triton (, since 2008)
Trelleborgs Steamship
Malmö KK
Saskatchewan Ran (−2008).