She received her Ph.D. at the Johann Wolfgang Goethe-University, Frankfurt am Main, Germany with a study on age reflection and self-portrayal in Oswald von Wolkenstein's oeuvre.
An important element in Sieglinde Hartmann's research approach is the international networking regarding German Medieval studies.
1376/77-1445), a widely travelled knight, considered to be the most important German composer and poet of the Late Middle Ages.
Thus her new approach opens up paths to a contextual understanding of Wolkenstein’s genius within other cultural phenomena of the ‘Waning Middle Ages’.
An important element in Sieglinde Hartmann's work regarding Wolkenstein is also the organization and presentation of Medieval concerts, often in cooperation with the Austrian musician Eberhard Kummer.