Katharina Faltner studied set and costume design at the Academy of Fine Arts Dresden. After her studies she worked on several productions at the Burgtheater in Vienna as an artistic assistant for Stéphane Laimé under the direction of Jan Bosse and Matthias Hartmann. There she designed the set for the Austrian premiere of demut vor deinen taten baby (humility before your actions baby) by Laura Naumann (director: Alexander Ratter). Together with Stéphane Laimé, she created the set for Stefan Pucher's staging of Woyzeck at Zurich’s Schauspielhaus. The world premiere of Endlich Kokain (Finally Cocaine) by Joachim Lottmann directed by Pedro Martins Beja led her to Bremen. She then designed the set for Arno Waschk’s production of Der Amerikaner, der den Kolumbus zuerst entdeckte (The American who first discovered Columbus) in Darmstadt. At the beginning of the 2016/17 season, she created the costume design for Philipp Rosendahl's production of Die Räuber (The Robbers) in Kassel. She has worked as a set designer with director Anna Bergmann since 2013, including on Homo Faber in Braunschweig, Scenes of a Marriage in Lübeck, Miss Julie in Vienna and La Douce at Berlin’s Staatsoper.
She regularly designs sets and costumes for premieres from director and author Nora Abdel-Maksoud, including Kings at the Ballhaus Naunynstraße Berlin (invited to the Radikal jung festival in 2015), Mad Madams in Halle, and Sie nannte ihn Tico (She named him Tico) at Munich’s Volksstheater. The Making-Of is her fourth work with Nora Abdel-Maksoud and her first designs for the Maxim Gorki Theatre.