It is well known that one can argue over different views – depending on how they are recolored through different  glasses.

Technical facts are, however, black and white. We survey them unvarnished and objectively to trace and display issues and to give independent expertise.

Based on our extensive practical experience on worldwide tunnelling and considering national and international guidelines, recommendations and standards, we provide professionally objective expertise.


This comprises a review of the current project status under considering of all technical boundary conditions.

As experts in geotechniques, construction management and tunnelling we analyze your project and bring clarity to complexity.


We work as independent experts on public international courts with the credo of representing the right of technical facts.

Tunnelling Consultant GmbH © Dr. Rehm | Tunnelling Consultant GmbH | Lotzbeckstr. 25 | D-77933 Lahr | Tel. +49 (0)7821 327 0606 | Mobile/cell +49 (0)151 15144817 |