Bratislava-born Austrian architect Siegfried Theiss studied in Wien (Vienna). After World War, he and his partner [Hans Jaksch] continued their architectural work. Theiss was also appointed as an associate professor at the Technical University in Wien, converted a few years later to a full professorship. Jaksch and Theiss built the airmen barracks in Wien, among other projects. After the Anschluss of Austria to the German Reich they mostly produced Nazi buildings. After World War II Theiss was de-Nazified and was allowed to participate in reconstruction projects in Austria.
Theiss also worked as a consultant, juror, and many other functions. In addition to the drafting of the Austrian building standard he had a significant input into the legal protection of the title of architect. Theiss’s commitment to his work can be found in numerous professional articles and reflected lectures.