What do we stand for?

We are specialists for project control, general planning, building construction planning, structural planning and local construction supervision, especially for architecturally demanding buildings and technically challenging infrastructure projects. Our 66 employees identify with their tasks and actively shape the company. We are a trustworthy partner for our customers.


Foundation of the Company

DI Dr. Thomas Lorenz

First Major Project

Structural engineering and site supervision for Vienna Air Traffic Control Tower

TLO goes Inter­national

Structural engineering for the OIC Tower in Saudi Arabia

Further Development

Conversion to 3D-planning and establishment of the façade department

House of Engineers Graz

Construction of our own office building in Graz

Expansion of Management

DI Roland Reichl and DI Jürgen Kraker join the management

TLO goes BIM

First fully digital construction site and implementation of a BIM process

Expansion of Ownership Structure

The company gets broadly based

Establishment of the Department General Planning & Building Construction

One-stop-shop! The service portfolio is expanded to include building construction planning

What distinguishes us?

We combine high social skills with handshake quality and positive team spirit. We also think outside the box and always see the big picture in a project.
As technicians, we think clearly structured and work according to well-considered quality standards.
0000_000_FO_191028_Gruppenfoto 7

Our values

We keep questioning traditional approaches. This makes us innovative and full of ideas for the benefit of our customers. We live in partnership, respectful and friendly dealings with colleagues, project partners and clients. Respect and fairness are important values for us. A solution-oriented access to tasks is important to us. We think creatively and interdisciplinary, we implement new technologies quickly.


We answer your questions quickly and reliably.


Graz, Wien


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