Who we are



Univ. Lect. Dipl.-Ing. Dr. techn.

In 2001 Robert Roithmayr graduated in Computer Science and Architecture at the Vienna University of Technology.

Since 2007 Robert Roithmayr is also legally certified engineer.

He is founder and owner of the Formfinder Software GmbH since 2006.


From 2009 to 2013 he was Chairman of the section "Architecture and Planning" of The Austrian Association of Engineers- and Architects (OIAV).


In 2010 he initiated the international post graduate MEng. Program at the Vienna University of Technology and is now based at the Danube University Krems.

The design and engineering of lightweight membrane structures and the development of the Formfinder Software are the prime objectives of Robert Roithmayr's professional life. Today Robert Roithmayr acts as planner and consultant on major international projects involving lightweight membrane structures.

Curriculum Vitae Robert Roithmayr (pdf)

LinkedIn Profile
Press Images (zip)




Horst Dürr

Architect Dipl.-Ing. (ETH)
Univ. Lect.



Since 1970 the architect Horst Dürr is engaged in the field of membrane and cablenet structures by doing design, consulting and in combination with a team of experts (IF Group). He also did a lot of projects as site manager. He has also been the technical director of Stromeyer Konstanz. From 1973 to 1980 he was the CEO of IPL Konstanz and since 1980 Partner of the IF Group.



Univ. Lect. Dr. habil

Member of the “Sonderforschungsbereich 64, Leichte Flächentragwerke“

Founder member of the “Sonderforschungsbereich 230, Natürliche Konstruktionen”

From 1985 to 2012 independent testing laboratory "LABOR BLUM" for tests and research for materials used in Lightweight Membrane Structures.

References samples are Olympic Sites in Munich, Allianz-Arena in Munich ETFE film roof structure, BC Place Vancouver, Maracana-Stadium Rio de Janeiro Brasil, Stadium Lia Manoliu Bukarest, Stadium Kiew Ukraine, Stadion Pusan Korea, Dehli Airport India, Vienna Airport Tower, Bangkok Airport

Univ. Lect. MEng. PhD.

Simon K. Chiu is founding partner of TensileEvolution.

In order to advance Membrane Architecture his focus is on the best-practice guideline for the Detail development of tensile structures. The state of the art tool is named "TARSO".

TensileEvolution is now based in North America, Los Angeles



The FORMFINDER TEAM is full with passion and has the goal to push the development of high quality Tensile Membrane Structures:


  • Oliver A. Wrulich Dipl.-Ing. Mag. Dr. rer. nat.
    Value Finder and C++ Programming, Lienz

  • Kim Nikolai Dipl.-Ing.
    Value Finder and C++ Programming, Wien

  • Hubertus Pöppinghaus Architect Dipl.-Ing. Dr. techn.
    Akquisition, Projects and Research, Konstanz

  • Franz Rohm
    Formfinder Project Finder, Wien

  • Ingrid Tagger
    Secretary and Formfinder Project Finder, Lienz

  • Jasmina Steiner MA
    Formfinder Projekt Finder and Research, Wien

  • Christian Burger Dipl.-Ing.
    ProjectFinder, Lienz

  • Marco Salcher
    Programming, Lienz

  • Ales Vanek Dipl.-Ing. Dr. techn.
    Formfinder Project Finder Development, Prague

  • Philipp Jurewicz Dipl.-Ing.
    Formfinder Projekt Finder Development

  • Raffael Prätterhoffer
    Software Development, Wien

  • Alex Liewehr
    Software Development, Wien

  • Roman Ivancsits
    Formfinder Project Finder, Amsterdam