Introduction Images of 150 years DEME, ending with a view on hashtag #DEME150.

Discover 150 years of DEME!

In 2026, DEME celebrates 150 years of marine and environmental engineering. From our early roots in 1876, we have grown from our origins in dredging and marine works into a leading, diversified group - shaped by expertise, innovation, resilience and a constant drive to push boundaries. 

Throughout this anniversary year, we’ll take you on a journey through our history, sharing stories and moments that show how challenges were approached, solutions were developed and ambitions kept moving forward. Across our channels and on this dedicated anniversary website, you can discover the people, projects and breakthroughs that made DEME what it is today. This website will be updated weekly with new stories. Throughout the year, we will use #DEME150 to share and connect these stories. 

As we reflect on 150 years, we continue to look ahead with the same spirit that defines us: We Care. We Dare. We Deliver.

1939

Trapped on the frontline at the outbreak of Second World War

On September 1, 1939, dredging operations in Poland came to an abrupt and terrifying halt. In Danzig (Gdańsk), crews were jolted awake by the thunder of gunfire from the German battleship Schleswig-Holstein as it opened fire on the Polish military depot at the Westerplatte peninsula. The Second World War had begun, and the crews found themselves exactly where it started.

For the workers on-site, building geopolitical tensions suddenly became an immediate race for survival. As the region descended into conflict, communication cut out, borders slammed shut, and standard routes vanished.

The journey home became a chaotic, dangerous, and deeply individual undertaking. With military mobilizations, shifting frontlines, and checkpoints blocking their path, crews had to navigate an unstable continent to get back to Belgium, often enduring long, stressful detours and weeks of uncertainty.

In a matter of days, dredging activities in the region came to a halt, caught in the sudden, violent reality of a world at war.

Disclaimer

With 150 years of history, there are countless moments to tell. In this anniversary year, we share a non-exhaustive selection of stories that illustrate how DEME became the company it is today. These stories are drawn from a variety of historical sources, including books by authors such as Dirk Podevijn and Mon Vanderosteyne, company publications and the input of colleagues across the organization. As this website looks back on 150 years of heritage, it features archival material from different eras. Safety standards and working practices have evolved significantly over time and should be understood in their historical context.