About us

About us

Since 1973, private and commercial clients have been relying on the static calculations and other services provided by our family-run company.

Since our foundation, more than 20,000 projects have been realised by our company. Structural calculations have been drawn up for single-family houses and industrial facilities, schools, hotels and for the renovation of old buildings. We have also developed fire and sound insulation concepts, provided energy advice and issued energy performance certificates.

The employees in our company are highly qualified and we have experts in a wide range of specialist fields. Our team is made up of construction engineers, architectural draughtsmen and the administrative staff. All of our employees ensure that they are always in tune with the very latest technologies. A host of additional qualifications have also been acquired.


Our equipment:

We are excellently prepared for all challenges not only with devices for examining construction work, but also with our modern PC workstations and an efficient network.

Equipped with these prerequisites, we can guarantee our clients competent advice and smooth handling of their projects, even under the most difficult circumstances.


1973   Company founded by Hans-Peter Fröhling
1992 Partnership with Manfred Rathjen, Ingenieurbüro Fröhling & Partner
Relocation to the current business address in Schulstrasse 22, 21698 Harsefeld, Germany
1996 Fröhling & Rathjen GbR mbH
2008 Hans-Peter Fröhling steps down from the company management
2008 Christian Fröhling and Thorben Rathjen join as managing directors
2012 Fröhling & Rathjen GmbH & Co. KG
40th anniversary
2013 Manfred Rathjen steps down from the company management