Rubuta ci gaba don wannan sakin layi - Kafin NCAA, an zabi ta a matsayin 'yar wasan hockey ta Switzerland a shekarar 2005. Tawagarta ta Switzerland ta zama ta takwas a Gasar Cin Kofin Duniya ta 2004 a Halifax. Marty ta bayyana a wasannin Olympics na 2006 a Turin inda tawagarta ta sami matsayi na bakwai. Daga 2003<unk>2007, ta buga wasa a EV Zug a gasar Switzerland. Tawagar ta sami Gasar Switzerland guda biyu a cikin 2004 da 2005 da Mataimakin Gasar Switzerland guda biyu a cikin 2006 da 2007. A Wasannin Wasannin Winter na Vancouver, ta daidaita rikodin wasannin Olympic don mafi yawan kwallaye da aka zira a gasa guda tare da tara kuma ta taimaka wa mahaifarta ta kammala a matsayi na biyar. A cikin wasa da Rasha a gasar cin kofin duniya ta mata ta 2012 IIHF
, Stefanie Marty ya zira kwallaye biyu a nasarar 5 zuwa 2, yayin da Switzerland ta ci gaba zuwa wasan kusa da na karshe.