* Dave Johnson and Associates - A Chicago area civil engineering firm provides engineering, surveying and project management services for industrial and commercial, municipalities and park districts.
* David E. Wooster and Associates, Inc . - Providing engineering services including traffic and parking impact analyses, systems and corridor analyses, traffic control, roadway, intersection and parking design, and mitigation strategies.
* Davis Engineering and Associates Limited - Civil engineering firm providing consulting, project management, and construction management services.
* Deep Foundation Experts - Subsurface constructors is a deep foundation contractor offering a full range of services as in complete design and build services, soil investigation, structural stabilization, installation of drill piers and shafts, earth retention systems, driven pile and related services.
* Denmon Engineering - Located in Monroe, Louisiana and Austin, Texas, Denmon Engineering provides quality civil engineering and land surveying services by experienced registered professional engineers and surveyors.
* Descon Engineering Limited - An integrated engineering and construction company operating in Pakistan and the Middle East.
* DGT Survey Engineering Division - Providing complete survey engineering, civil engineering, and cadd services.
* Dokken Engineering - A civil design firm specializing in public works designs. Specialists in freeway, interchanges, local roads, water and sewer, seismic retrofitting and construction support services.
* Dorsey and Dorsey Engineering, Inc . - A full service engineering company specializing in the design and inspection of military and commercial airfields.
