8i Cooperation Partners

Björnsen Consulting Engineers are among the leading German engineering companies and experts in water, environment, civil engineering, information technology, energy and architecture.

BIESKE UND PARTNER is primarily active nationwide and in the neighboring countries as well as selectively also internationally in an advisory and planning capacity in all specialist areas of water supply.

envi-systems GmbH handles the entire data management for water supply and disposal companies as well as for engineering firms and companies.

Company FRANK specializes in the development, production and distribution of sustainable pipe systems (pipe, fittings, tanks etc.)  for water, sewage, gas, geothermal and industrial applications.

grünbeck deals with water treatment technologies and produces solutions that ensure a high water quality even in challenging environments.


Swiptec Engineering focus on renewable energies and energy efficiency for buildings.