Sibylle Wallum studied Design for Performance (BAHons of Fine Arts) at Central Saint Martins College of Art and Design in London. After her studies, she assisted at the Thalia Theater Hamburg and was also Frida Parmeggiani's costume assistant for several months on Robert Wilson's St. John Passion at the Théâtre du Châtelet in Paris.
This was followed by freelance collaborations with directors such as Anne Lenk, Jette Steckel, Anna Bergmann, David Hermann, Jan Philipp Glogger and Thorleiffur Öre Arnarsson.
She has worked closely with director Anne Lenk for many years. Joint works such as Der Menschenfeind and Maria Stuart at the Deutsches Theater were invited to the Theatertreffen in 2020 and 2021.
Further costume designs are also being created for the Burgtheater Vienna, Residenztheater Munich, Thalia Theater Hamburg, Staatsschauspiel Hannover, Staatsschauspiel Dresden, Stadttheater Bern, Staatstheater Nürnberg, Staatstheater Karlsruhe and Theater Bonn, as well as for the Frankfurt Opera, Volksoper Wien, Cologne Opera and the Bayreuth Festival.
Sibylle Wallum was nominated as Costume Designer of the Year 2021 in the critics' survey of the magazine Theater Heute for the costume design of Maria Stuart directed by Anne Lenk, as well as for Faust 2022 for the costume design of Pippi Longstocking directed by Jette Steckel.