At the end of the 1980s and the start of the 1990s, just as there was beginning to be a general awareness of and a world-wide move towards the concept of sustainable development, Greisch office took advantage of its knowledge and its skills in the field of civil engineering to turn its attention to environmental services.

To its existing skills of a knowledge of materials and of the stability of structures, of geotechnics and soil mechanics, of hydrology and hydraulics were added the more specific skills of waste containment, sewage treatment and the efficient treatment of rainwater in stormwater holding basins.

When designing such structures, Greisch office remains faithful to its philosophy and takes great care to integrate them into the practical town planning, landscaping and environmental requirements.