Construction and civil engineering companies of Austria

Strabag is an Austrian international technology group for the built environment based in Spittal an der Drau, Austria, with its headquarters in Vienna. It is the largest construction company in Austria and one of the largest construction companies in Europe. The company is active in its home markets Austria and Germany and in all countries of Central, Eastern and South-Eastern Europe, in selected markets in Western Europe, on the Arabian Peninsula, as well as in Australia, Canada, Chile, China and India. In these markets Strabag has subsidiaries or operates on a project-basis.

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PORR AG (stylised by the company as PORR AG) is an Austrian construction group headquartered in Vienna. Listed on the Vienna Stock Exchange, it is among the largest construction companies in Austria and operates internationally across major segments of the construction industry, including civil engineering, tunnelling, building construction, environmental engineering, and facility management.

Waagner Biro is a Vienna-based group of companies formerly part of the same group which have developed into separately owned, independent companies operating in steel and mechanical engineering. Collectively, the companies have about 1000 employees in various locations in Europe, Asia, and the Middle East.