De Haas Shipyards, established in 1879, specializes in the construction, maintenance, repair, and refitting of various vessels, including patrol boats, tugs, workboats, crew transfer vessels, search and rescue vessels, superyachts, and other specialized commercial vessels. Operating two strategically located shipyards in the Port of Rotterdam—one in Maassluis and another in Rotterdam—the company offers comprehensive maritime services. Their facilities are equipped with Marine Travelifts capable of lifting vessels up to 820 tons, ensuring efficient drydocking and servicing.

De Haas Shipyards also focuses on newbuild projects, particularly for government and military applications, emphasizing innovation and high-quality craftsmanship.