As part of the German women's national wheelchair basketball team, she won bronze at the 2006 World Cup in Amsterdam, won three time European champions (in 2007, 2009, 2011), a silver medal at the 2008 Summer Paralympics in Beijing, and a gold medal at the 2012 Summer Paralympics in London.

President Joachim Gauck awarded the team a second Silver Leaf after it won the gold medal at the 2012 Summer Paralympics.

On 24 May 2015, she won silver in the women's KL1 200 m race at the 2015 ICF Canoe Sprint World Cup in Duisburg.

In 2005, she was invited to attend a German national team training camp by its coach, Holger Glinicki.

[7] Her American degree was accepted in Germany, and she qualified as a rehabilitation therapist at BG Trauma Hospital in Hamburg-Boberg.

She worked with paraplegic patients, helping them become wheelchair mobile, by strengthening the chest and upper arm muscles.

"[7] In September 2008, Müller participated in the 2008 Summer Paralympics in Beijing, but Germany was beaten in the gold medal game by the team the United States, which contained a number of former teammates and opponents from the University of Illinois.

[2] They hoped for a rematch against the United States at the 2012 Summer Paralympic Games in London,[2] but instead faced the team that had beaten the Americans, the Australia women's national wheelchair basketball team,[9] which included former Illinois teammates Shelley Chaplin and Bridie Kean.

[5] They defeated the Australians in front of a crowd of over 12,000 to win the gold medal,[4][9] They were awarded another Silver Laurel Leaf by President Joachim Gauck in November 2012,[10] and were again named Team of the Year for 2012.