Allseas Group S.A. is a world renowned contractor in offshore pipeline installation, heavy lift and subsea construction. We employ over 4000 people worldwide and operate a fleet of specialised heavy-lift, pipelay and support vessels, designed and developed in-house. We have executed more than 300 projects and installed over 23,500 km of subsea pipeline.

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Pipelines and subsea

Allseas specialises in the design and installation of subsea pipelines and associated seabed structures for all water depths; from very shallow to ultra-deepwater environments.

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Heavy lifting

Allseas has revolutionised “single lifting” by developing an innovative technique to install and remove entire offshore structures in one lift using a motion compensation system developed in-house.

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Allseas continuously improves the performance of its vessels and equipment by developing new technologies that enable us to execute more challenging projects safer, more efficiently and to the highest quality.

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Allseas has various specialised facilities where custom-made equipment and structures for commercial projects are fabricated, as well as parts for vessel new-builds and vessel modifications.

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Allseas contributes to maintaining a clean and healthy environment by devising solutions such as single-lift platform decommissioning, in that manner also protecting the sea.
Our vessels operate with state-of-the-art machinery to minimise exhaust fumes.

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At Allseas, we take matters of workplace safety and health very seriously. In all of our operations, we are guided by our goal of zero incidents and accidents.
An important tool in achieving this goal is the behaviour-based safety programme “Allsafe”.

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For over 30 years, Allseas 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.

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Allseas tax strategy

At Allseas, we are committed to high standards of ethics and integrity in all aspects of our business, and to ensuring our activities are conducted in accordance with applicable laws and regulations.

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Contact Allseas’ public relations department for images and information about our company and vessels: Get in touch

For inquiries regarding offshore installation or decommissioning projects, contact our sales and marketing department: Get in touch