The name D&S stands for Diaphragm Wall and Slurry Wall, clearly reflecting our specialization in these techniques. This focused approach allows our experts to deeply immerse themselves in these methods, continually expanding their knowledge to deliver the highest quality to our customers.

D&S is synonymous with innovation, consistently enhancing and renewing our services. This dedication aligns perfectly with our founding companies, which offer a wide range of foundation and civil engineering techniques. Together, we provide comprehensive solutions in foundation technology and large-scale infrastructure for complex projects.

DEME Group

DEME is a world leader in specialised fields such as offshore energy, dredging, maritime infrastructure and environmental projects. With almost 150 years of experience and more than 5,000 professionals, DEME offers innovative and sustainable solutions to major global challenges

DEME Infra is involved in maritime infrastructure and civil works where diaphragm walls play an important role. This includes the design and construction of hydraulic engineering works such as quay walls, port terminals, locks and weirs; infrastructural works such as cut-and-cover tunnels or bridge foundation works, canal construction and bank protection, etc. DEME Infra has a specialised engineering and design department, which can assist our customers with complex infrastructure projects.

SMET Group

SMET Group is a family business that has been a specialist in foundation, environment and other underground techniques since 1900. With more than 570 employees, around 830 construction sites per year are brought to a successful realization. SMET is renowned for its innovative approach, not just adhering to existing methods but also designing and implementing new machines and techniques. With a specialized workshop dedicated to the construction and maintenance of machinery, SMET ensures that their foundation works are performed under optimal conditions. This approach has been highly valued by customers for many years, both domestically and internationally

STEIN HT

STEIN HT is a leading company specializing in diaphragm wall foundation technology. Based in Herne, Germany, it has earned the trust of top construction companies worldwide, boasting over 40 years of experience in international projects. Through its subsidiary, MFS Maschinenfabrik, STEIN is recognized globally for designing and producing mechanical diaphragm grabs. These robust, virtually maintenance-free machines meet the stringent demands of modern projects. Additionally, STEIN designs and manufactures other specialized diaphragm wall equipment in-house.