The rower from Pirna Rowing Club 1872 1996 was second in the Junior World Championships in the quadruple sculls, 1997, she won the title in the double sculls. In 1998, she finished third in the One. In 1999 she took up at the U23 World Championships and won in quadruple sculls. For the 2000 Olympics, she was nominated as Ersatzruderin. 2001 Peggy Waleska won her first national title in the quadruple sculls and at the World Championships on the Rotsee in Lucerne, she won along with Marita Scholz, Manuela Lutze and Manja Kowalski.
In 2002, Peggy Waleska to Dresden RC. After winning the German championship title in the quadruple sculls she was also successful at the World Championships in Seville, together with Marita Scholz, Manuela Lutze and Kerstin Kowalski, she won her second world title. In 2003, she again won at the German Championships, at the World Championships in Milan sculls received in the same cast as last year bronze. 2004 Peggy Waleska won its fourth national title in the quadruple sculls. At the Olympic Games in Athens, she started together with Britta Oppelt in the double sculls. The two rowers won the silver medal behind Georgina and Caroline Evers - Swindell of New Zealand.
2005 Peggy Waleska went to the One, finishing in eighth place at the World Championships in Gifu, at the World Championships in Eton went they did only to twelfth place. A year later, Peggy Waleska came at the World Championships on the Rowing Course near Munich in the double sculls and finished with Christiane Huth sixth place. At the 2009 World Championships Peggy Waleska won the bronze medal with the German sculls.