Maiden name Joelle Franzmann. Since 2023, Joelle has been competing under her married name Joelle Tesche.
Joelle was one of the most consistent competitors in the triathlon world. She placed in the top 5 at the 2003 ITU Queenstown World Championships and the 2004 ITU Madeira World Championships. Franzmann showed success and consistency throughout the ITU World Cup Series. Already in 2005, the German triathlete placed 4th at the Honolulu World Cup and 3rd at the Mazatlan World Cup. In the future, Franzmann aspires to be a World Champion, compete at the 2008 Olympics, and become a teacher when she retires from triathlon.