Who we are


Robert Roithmayr

Architect Civil Eng.
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)

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Horst Dürr

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




Architect (ETH) Horst Dürr works since the year 2000 with the Formfinder Team.

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.


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Rainer Blum


Univ. Lect. Dr. habil.


Dr. Rainer Blum has been in the Formfinder Research and Development team since 2012.

From 1985 to 2012, independent testing laboratory "LABOR BLUM" for tests and research for materials used in Lightweight Membrane Structures.Member of the “Sonderforschungsbereich 64, Leichte Flächentragwerke“Founder member of the “Sonderforschungsbereich 230, Natürliche

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

Curriculum Vitae Rainer Blum (pdf)

LinkedIn Profile



Simon K. Chiu

Univ. Lect. M.Eng. 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 Membrane Architecture:


  • Oliver A. Wrulich Dipl.-Ing. Mag. Dr. rer. nat.
    Formfinder Programming, Lienz Austria

  • Kim Nikolai Dipl.-Ing., Dr. techn. cand.
    Formfinder Programming, Wien Vienna Austria

  • Franz Rohm Dipl.-Ing. cand.
    Formfinder Projects, Wien Vienna Austria

  • Mark Ortler Dipl.-Ing. cand.
    Formfinder Programming, Wien Vienna Austria

  • Thomas Köstinger Ing. MSc
    Formfinder Projects, Wien Vienna Austria

  • Alexey Shirayev Dipl.-Ing. MEng. cand.
    Formfinder Programming, Wien Vienna Austria

  • Beatriz Ferreyra Architect MEng.
    Formfinder Projects, Portland Oregon USA

  • Roman Pryjomko PhD.
    Formfinder Strategy, Vienna Austria and Krakau Poland

  • Rico Thüler Dipl.-Ing. (ETH)
    Formfinder Management and Strategy, St. Gallen Switzerland

  • Marco Cavelty (Betr. oec.)
    Formfinder Strategy, Membrane Energy, St. Gallen Switzerland

  • Christian Burger Dipl.-Ing.
    Formfinder Projects, Lienz Austria and Munich Germany

  • Marco Salcher Ing.
    Formfinder Programming, Lienz Austria

  • Ales Vanek Dipl.-Ing. Dr. techn. M.Eng. Univ. Lect.
    Formfinder Engineering and Projects, Prague Czech

  • Philipp Jurewicz Dipl.-Ing. Dr. techn.
    Formfinder Programming and Projects, Wien Vienna Austria

  • Patricia Méndez Casillas Dipl.-Ing.
    Formfinder Research and Development, Madrid Spain

  • Hubertus Pöppinghaus Dipl.-Ing. Dr. techn.
    Formfinder Research and Development, Barcelona Spain

  • Raffael Prätterhoffer Dipl.-Ing.
    Formfinder Programming, Wien Vienna Austria

  • Alex Liewehr Dipl.-Ing.
    Formfinder Programming, Wien Vienna Austria

  • Roman Ivancsits Dipl.-Ing.
    Formfinder Projects, Wien Vienna Austria and USA

  • Romualdo Rivera Torres MEng, PhD cand.
    Design Guide, Florida USA

  • Miklós Halada Univ.-Prof. MEng. Dr.-Ing.
    Formfinder Glossary, Hungarian Translation, University of Pécs Hungary

  • Rasool Aldulaimi Dipl.-Ing. MEng
    Formfinder Glossary, Arabic Translation, Syria and Lienz Austria

  • Felipe Alvarado Arch. Dipl.-Ing. MEng cand.
    Formfinder Projects, Chile

  • Serguei Manuel Joa Dubitskaya Dipl.-Ing.
    Formfinder Engineering and Glossary, Spanish Translation Habana Cuba

  • Andrés Cañas Arch. Dipl.-Ing.
    Formfinder Glossary, Spanish Translation, San José Costa Rica

  • Alexey Fedulov Civil. Eng. Dipl.-Ing.
    Formfinder Engineering and Glossary

International Training Centres


TensileEvolution North America

Mr. Simon K. Chiu
Arch. Univ. Lect. MEng. PhD.
E-Mail: simon@formfinder.com
Los Angeles, California


Australia and New Zealand

Mr. Trevor Scott
Free Call Australia: 1800 551 556
Fon: +61 7 5478 0590
E-Mail: trevor@formfinder.com
P.O. Box 6088
Maroochydore BC
Queensland 4558




Mr. Christian Bartl
Arch. EUR ING M.Eng.
Mobile: +43 664 1024077
E-Mail: christian@formfinder.com
Brennerstrasse 43
A-6150 Steinach am Brenner



Mrs. Barbara Noltensmeyer Dietrich
Fon: +49 228 9675845
E-Mail: mail@formfinder.com
Eupenerstrasse 9
D-53117 Bonn



Hong Kong

Mr. Clive Kirsten
Univ.-Lect. B.Arch MEng.
Lightweight Works
Fon: +852 5451877
E-Mail: mail@formfinder.com
1/F. 27 des Voeux Road West
Hong Kong



Mr. Miklós Halada
Univ.-Prof. MEng. Dr.-Ing.
Fon: +36  70 2351956
E-Mail: mail@formfinder.com
HU-7625 Pécs
Surányi M. street 23/2



Mr. Nikhil Gandhi
Architect, MEng.
Fon: +91 99670 53322
E-Mail: nikhil@formfinder.com
19, Parsi Panchayat Road,
Andheri (East) Mumbai 400 069



Mr. Juan Jose Ramirez Zamora
Engineer M.Eng.
Fon: +52 33 30701640
E-Mail: juan@formfinder.com
Hector Berlioz # 4792, H 203,
Col. Residencial Cordilleras
Zapopan, Jalisco
C.P. 45030



Mr. Juan Pablo Csori Rios
Engineer M.Eng.
Mobile: +56 88 273484
Fon: +56 41 2134557
E-Mail: jp@formfinder.com
Av. Collao, 1202, CDEUBB.


Mr. Andrei-Dragos Dumitrescu
Architect M.Eng.
Fon: +40 730 08958
E-Mail: mail@formfinder.com
Str. Constantei, nr. 2B, Cumpana
Constanta  907105



Mr. Ismail  Sariay
Architect MSc. MEng.
Fon/Fax +90 232 5120414
Mobile  +90 533 6475140
E-Mail: mail@formfinder.com
1462 Sok. No: 21/1



We currently do NOT operate in Russia, and we hope for peace!



Mr. Serguei Manuel Joa Dubitskaya
Engineer M.Eng.
Fon: +53 52460358
E-Mail: mail@formfinder.com
Aramburu #354 apto. 2 e/ San José y San Rafael, Centro Habana
10300  Cuidad de La Habana