[1] Fissler started as an artistic gymnast as one of her mom's sisters was involved with the sport and began training her, she later switch to rhythmic.

[2] In 1996 she entered the national senior group, competing at the 1998 World Championships in Seville along Selma Neuhaus, Susan Benicke, Anna Nölder, Anne Jung and Ellen Jackël, they finished 14th in the All-Around and 8th with 6 balls.

[4] At the World Championships in Osaka they were 5th in the All-Around, 5th with 10 clubs and 7th with 3 ribbons and 2 hoops, thus qualifying for the following year's Olympics.

[2] Jeanine and her teammates Friederike Arlt, Susan Benike, Selma Neuhaus, Jessica Schumacher and Annika Seibel achieved a surprising fourth place at the 2000 Sydney Olympics, this was the best ever rhythmic gymnastics result in German Olympic history.

[7][8] Fissler later became a graduated sports coach by profession and founded her own gymnastics talent school at Berlin.