Duesseldorf:
DSTV – German Steel Construction Association, Duesseldorf
German Traffic Forum, Bonn
STUVA, Study Society for Underground Traffic Systems
German Road League
VBI – Association of Counselling Engineers
BVMB – Federal Union of Medium-Sized Construction Enterprises
German Concrete Society, Wiesbaden
Chamber of Engineering, Construction, Düsseldorf

Frankfurt/Main:
Chamber of Engineering of the Federal State of Hessen

Berlin:
IVBH – International Association for Bridge Construction and Structural Engineering
BK – Berlin Chamber of Construction
Research Association for Road and Traffic Systems
GF VSVI Berlin- Brandenburg – Management of the Society of Road and Traffic Construction Engineers