Allseas

We build on our successes and continue to improve, refine and develop new applications. Our vessels are designed in-house and equipped with cutting-edge technology that allows us to push the boundaries of heavy lift, pipelay and subsea installation even further. Dynamic positioned offshore supply vessels, providing a seamless, continuous flow of line pipe and project materials. The world’s largest and most versatile construction vessel, represents a step change in offshore engineering. One of the world’s most advanced pipelay vessels, consistently setting new standards in pipeline installation. Our most versatile pipelay vessel, optimised for a wide range of installation scopes in all water depths. The world’s first DP pipelay vessel, delivering unmatched performance and reliability over 4 decades at sea. The world’s first deep-sea mineral production vessel with seabed-to-surface nodule collection and transport systems. Advanced offshore support vessel enhanced for complex deep-water installation and construction operations. State-of-the-art offshore construction support vessel, excelling in jumper, umbilical and subsea structure installations. Semi-submersible Heavy Transport Vessel (HTV) purpose-built for seamless topsides transfers to Pioneering Spirit. Dynamic positioned offshore supply vessels, providing a seamless, continuous flow of line pipe and project materials. The world’s largest and most versatile construction vessel, represents a step change in offshore engineering. One of the world’s most advanced pipelay vessels, consistently setting new standards in pipeline installation. Looking for your next challenge? Join the team behind some of the world's largest offshore engineering projects. Explore careers Our vessels are designed in-house and equipped with cutting-edge technology that allows us to push the boundaries of heavy lift, pipelay and subsea installation even further. Our industry-defining, motion-compensated lift system provides unmatched capacity and capability in the installation and removal of new and disused offshore platform facilities. Our fully automated welding, line-up, and inspection systems set a new benchmark in pipeline production, delivering superior performance, safety, and efficiency. Our next-generation field joint coating systems offer unparalleled flexibility and advanced corrosion protection with every application. Our customised state-of-the-art construction, inspection and intervention tools ensure superior workability in even the most challenging subsea environments worldwide. Passionate, innovative and reliable. That’s how we shift the boundaries of offshore technology. Allseas is a family-owned offshore contractor established in 1985, specialising in pipelay, heavy lift and subsea construction. The company employs approximately 4000 people worldwide. Allseas, founded in January 1985, has developed cutting-edge technology and has moved boundaries. By continuously growing our know-how and expertise, we have developed into a world-leading offshore contractor. Allseas was founded in January 1985, opening offices in Châtel Saint-Denis, Switzerland, and The Hague, the Netherlands. Launched a year later (1986), the vessel quickly set a new standard in offshore pipelay, as Allseas gained a strong foothold in the North Sea market specialising in the installation of small-to-medium diameter pipelines. The company also unveiled its idea for the single-lift installation of large integrated platform topsides with motion compensation (1987).