The chemistry Ph.D. student at the University of Stuttgart,[2] who does research in the field of asymmetric catalysis in the group of Prof. René Peters, competed for TSV Schmiden and is trained by Natalia Stsiapanava, Ekaterina Kotelikova and Vladimir Komkov.

As the captain she was initially the central element around which the newly designed national group was built for the next Olympic Games.

There she was 13th with Maike Deuschle, Johanna Gabor, Sara Radman and Karolina Raskina in the group All-Around and 13th with 3 ribbons + 2 ropes, 14th with 5 hoops.

[5][6][7] At the European Championships in spring 2010 in Bremen, Pfeffer missed out on a medal with Cathrin Puhl, Radman, Mira Bimperling, Raskina and Regina Sergeeva she missed a medal in the team competition as Germany finished in 4th place behind Russia, Italy and Belarus, she also finished 4th in the apparatus finals.

At the World Championships one year later in Montpellier with Regina Sergeeva, Cathrin Puhl, Nicole Müller, Sara Radman and Mira Bimperling she finished 6th in the group All-Around, as well as 7th with 5 balls and 5th with 3 ribbons + 2 hoops.