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Construction is a people business. Our dedicated employees are a decisive factor in our success. Entrepreneurial thinking is becoming ever more important. We are ideally equipped for the future with our management team, a team that encourages all PORRians to contribute and play a proactive role in shaping PORR.

Executive Board of the PORR S.A.

Piotr Kledzik Chief Executive Officer
Jakub Chojnacki Executive Board member and Financial Director
Dariusz Wietrzyński Executive Board member
Siegfried Weindok Executive Board member


Supervisory Board.

Johannes Wenkenbach
Andreas Sauer
Thomas Stiegler
Stephan Walder

Executive Board of the PORR Group.

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 for 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 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 over the course of his international career.

Hans Wenkenbach (COO)

Born 1957, married, two sons.

After graduating from 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 & Freytag 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.