DVGWGerman Technical and Scientific Association for Gas and Water (DVGW)
DWAGerman Association for Water, Wastewater and Waste
FIGAWAFederal Association of Gas and Water Companies
Güteschutz Kanalbau 
IROInstitute for pipeline construction at the University of Applied Sciences, Oldenburg
 Association of the North-West German Textile and Clothing Industry
DCAThe Drilling Contractors Association (DCA-Europe) An European organisation for quality and education in HDD