We make challenging architecture a reality.

Thomas Lorenz ZT GmbH is a leading civil engineering company in Austria that also operates internationally.

As specialists for project control, general planning, building construction planning, structural planning and local construction supervision, we primarily implement architecturally challenging buildings and technically demanding infrastructure projects. Our company employs over 60 people, has its headquarters in Graz and a branch in Vienna.

Our top projects

What we stand for:
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solution-oriented and innovative

We don't see problems, we present solutions!

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Holistic project management

We are a one-stop-shop - from the project study to the handover of your completed project.

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Employee satisfaction

Satisfied employees are our greatest asset - we pay particular attention to that!

cooperative, inventive and solution-oriented

We always question traditional approaches. As a result, we are constantly innovative and imaginative for the benefit of our customers. We are characterized by solution-oriented access even in challenging situations. We think across disciplines and quickly implement new technologies.

We BIM for you!

With the BIM method, we focus on the consistent use of a digital model throughout the entire life cycle of a building – from the first study to the end of use. For us, BIM is not a software solution, but an integrated working method for the optimization of planning, construction and utilization processes.

BIM leads us to a technological quantum leap that will change the entire construction industry!

Partners and customers:


We answer your questions quickly and reliably.


Graz, Wien


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