In the years following the First World War, the founders rebuilt their position through active participation in major tenders in Belgium. Rather than a single breakthrough project, this period was marked by sustained involvement in competitive bidding for complex infrastructure and port works.

In Antwerp, this included tenders for the Canal Dock and the Kruisschans Lock. These were both technically demanding projects that required extensive studies and close collaboration with French partners such as Schneider, Fougerolle, and the Société de Gobertange. During the same period, tenders were also prepared for works, which included a dry dock in the Port of Ghent, the Brussels-Charleroi Canal, and, later on, the Kattendijk Dock in Antwerp.

Given that the competition and price pressure were intense, not all of the contracts were awarded. Nevertheless, this continued presence in major tender procedures was essential as it kept expertise sharp, reinforced international partnerships, and laid the groundwork for a renewed move beyond Europe later in the decade.