Allemann started her motorsport career in karting in 1994, where she was active until 2003. In 2004 she transferred into formula racing and finished sixth of the Swiss Formula Renault. After they had taken part in four races in the German Formula Renault in 2004, she joined in 2005 the entire season in the series and finished in twelfth place overall. She also started in Formula Renault 2.0 Eurocup, where they remained without points.
In 2006, the Swiss in the German Formula 3 Cup and finished the season with two podium finishes in ninth place overall. In 2007 she received a cockpit with Manor Motorsport in the Formula 3 Euro Series. While her teammates repeatedly went to the podium and even won races, Allemann could retract points in any race. In the overall standings, she took the 20th place.
2008 Allemann left Europe and came to American Spirit Racing in the Indy Lights. With a fourth place as best result was 14th in the overall standings. In 2009 she received no cockpit for a full season and took part in only two races of the ADAC GT Masters. In 2010 she again received no cockpit for a full season and entered for Matech Competition Ford in GT1 in to two races of the new FIA GT1 World Championship. She also debuted for Matech Competition at the 24 - hour race at Le Mans. Since 2012, she goes for the Audi customer team Hitotsuyama Racing in the Japanese Super GT championship.
Le Mans results
Since March 2013, Cyndie Allemann with Alexander Wesselsky seen in the mission car on Sport 1.