Xenia Maria Mann began her vocal studies with Scipio Colombo in Karlsruhe. She received further tuition with Heather Harper, London and Giulietta Simionato, Milan. In 1994 she graduated from the Stuttgart Opera School.

In the same year she joined the State Opera of Lower Saxony in Hannover where her roles have included Ulrica (Ballo), Mrs. Quickly (Falstaff), Hansel and the Mother (Hansel and Gretel), Magdalena (Meistersinger), Erda (Rheingold), Clairon (Capriccio) and Penelope (Ulisse).

Xenia Maria Mann is a much sought-after Oratorio singer in Germany and other European countries. A concert tour with Handel´s Messiah took her to Namibia and South Africa. She performs regularly with Reinhard Goebel and Musica Antiqua Köln including radio recordings.

Xenia Maria Mann has been much acclaimed in Lied-Repertoire with piano and orchestra as well as for her interpretations of contemporary music. Various composers have dedicated works to her, some of which she has recorded for CD.

Together with the producer Stefan Zednik, Xenia Maria Mann founded in 1996 a new ensemble for experimental music-theatre, the MusikSchauBühne Stuttgart. Projects have included a scenic development of Handel´s Lucretia and also a very successful programme for singer and dancer jointly created with her brother, the dancer Frieder Mann.

In 2000 she left the State Opera Hannover and since has worked free-lance. She was a guest at the State Opera in Braunschweig, the State Opera of Nuremberg, the Landestheater in Eisenach and the Theatre of the Landeshauptstadt Kiel. In 2007 she returned to Hannover State Opera where she sang in the World Premiere of Edward Rushtons "The Pious Gemima" and in Benjamin Brittens "Peter Grimes".