Mario Steiner is an Austrian architect who lived and worked in Copenhagen for eight years.

Until 2025, he was part of COBE Architects, where he contributed to several large-scale projects at the intersection of architecture, urbanism, and sustainability.

Before joining COBE, he spent four years at 3XN Architects, working on major German projects such as The Cube in Berlin, the Schüco Headquarters in Bielefeld, and the Duale Hochschule in Stuttgart. His focus has always been on the interface between competition and execution, bridging concept and construction.

Since 2019, he has also been part of Scale Denmark, where he leads architecture tours in Copenhagen, sharing insights into contemporary Nordic architecture and urban design.

In 2017, he completed his Master in Architecture at the University of Applied Sciences Graz with his thesis “Marianne”, in collaboration with Atelier Thomas Pucher. Prior to that, he gained experience at feld72 in Vienna, Schneider & Schneider Architekten in Aarau, and through various competitions and freelance projects.

He believes that optimism is one of the most powerful tools in architecture.