She continued her music studies at the Hochschule für Musik und Theater Hannover, where her teachers included Martin Brauss and Eiji Ōue, in conducting, and she continued piano studied with Kämmerling and with Bernd Goetzke.

In 2006, Mallwitz joined the conducting staff of the Theater und Orchester Heidelberg, at the invitation of then-GMD Cornelius Meister, as a repetiteur.

During her third month of work in Heidelberg, she made her debut professional conducting appearance there, at 6 hours' notice, at the first night of the company's new production of Madama Butterfly.

[14] Mallwitz is married to the German tenor Simon Bode, who is an ensemble member of the Oper Frankfurt.

[14][18] Mallwitz is featured as conductor on a commercial recording for Oehms Classics and on a DVD for Deutsche Grammophon of the 2020 Salzburg Festival production of Così fan tutte.