She began competing internationally with Matthieu Jost in the mid-1990s. They competed for three seasons on the International Skating Union Junior Grand Prix series and placed 11th at the 2000 World Junior Championships. Petetin/Jost moved up to the senior level in the 2000-2001 season.
They last competed together at the 2004 European Championships, where they finished 12th.
Petetin retired due to injury. (with Jost).