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Construction is a people business. Dedicated teams secure our success. Entrepreneurial thinking is becoming ever more important. We are ideally equipped for the future with our management team, a team that encourages every PORRian to contribute and play a proactive role in shaping PORR.

Group Executive Board

There is a four-strong Group Executive Board at the head of PORR: Karl-Heinz Strauss as CEO and majority shareholder, Andreas Sauer as CFO and Hans Wenkenbach and Thomas Stiegler as COO. Their comprehensive expertise and competencies in the fields of economics, financing and construction are what makes our Board a powerful team, while their forward-looking ideas ensure stability and continuity.

Karl-Heinz Strauss, MBA (CEO)

Born 1960, married, one daughter, one son

After graduating from the technical college of civil engineering, Karl-Heinz Strauss studied at Harvard University, at the Management Business School in St. Gallen and received his MBA from the IMADEC University in Vienna. Until 2000, he held various positions at Raiffeisen Zentralbank – including in the construction and real-estate divisions. He then founded Strauss & Partner Immobilien GmbH, whose best-known projects include the EURO PLAZA office park in Vienna. He took over as Chief Executive Officer of PORR AG in September 2010.

Andreas Sauer (CFO)

Born in 1968, married, one daughter 
Andreas Sauer studied Economics at the University of Mannheim, graduating in 1995. He began his career at Deutsche Bahn, first in the Group's freight transport department and later at Schenker logistics. The next stage of his career took him to Infineon; Andreas Sauer's most recent position was operational CFO at Nokia Mobile Networks. Now PORR stands to profit from his extensive expertise gained in the course of his international career.

Hans Wenkenbach (COO)

Born 1957, married, two sons

After graduating from the Delft University of Technology, J. Johannes Wenkenbach began his career at the Dutch construction company Ballast Nedam Groep. He extended his international expertise in the construction business at various international construction companies, such as the Royal BAM Group subsidiary Wayss & Freitag Ingenieurbau AG. His most recent positions were COO of the El Seif Group in Saudi Arabia and Vice President of its infrastructure division. He has been Chief Operating Officer of PORR AG since February 2012.

Dipl.-Bw. (FH) Thomas Stiegler (COO)

Born 1965, married, one daughter, one son

After completing his studies in business administration, Thomas Stiegler worked for the auditing firm KPMG before starting his international career at Bilfinger Berger AG (now Bilfinger SE) in 1993. Until 2010, he held various management positions in the international construction business in Asia, Europe, the MENA region and North America. Since 2010, Stiegler has been Head of Business Unit 3 - International at PORR Bau GmbH. There he is responsible for the Group's activities in Eastern Europe and the Northern European countries. In December 2018, Stiegler was appointed Chief Operating Officer of PORR AG.

Members of the Executive Board

The Executive Board is the management body for the PORR operating business. It bundles the operating competencies from the individual business units and selected shared services. With their expertise, the members of the Executive Board support our Group Executive Board for every decision with their specialist and detailed knowledge.

Member of Executive Board

Mag. Ing. Kurt Lackner
Bmst. Ing. Christian Motz
Bmst. Ing. Josef Pein
Josef Stekovics
Bmst. Dipl.-Ing. Zeljko Vocinkic
Dipl.-Wirt.-Ing. (FH) Ralf Reinfelder
Thorsten Härtel
Piotr Kledzik
Ing.Mag. (FH) Udo Magyar
Dipl. Ing. Rainer Rengshausen
Dr. Ludwig Steinbauer
MMag. Stephan Walder, LL.M.

Supervisory Board

The Supervisory Board of PORR AG consists of experienced, successful entrepreneurs and managers and supports our management team with regard to strategic issues.


Karl Pistotnik (Chairman)
Klaus Ortner (Deputy Chairman)


Michael Diederich
Robert Grüneis
Walter Knirsch
Iris Ortner
Bernhard Vanas
Susanne Weiss
Thomas Winischhofer

Appointed by the Works Council

Peter Grandits
Gottfried Hatzenbichler
Michael Kaincz
Wolfgang Ringhofer
Dipl.-Ing. Michael Tomitz