Bluewhale Offshore and OOS Group signed an agreement in December 2025, formally moving their collaboration into a new phase focused on strengthening and expanding their offshore service offering.

Under the deal, Bluewhale Offshore will hold a substantial stake in OOS-International B.V., which has more than 15 years of experience in offshore accommodation, heavy lift, decommissioning, and field maintenance services across global markets. The Singapore-based Bluewhale Offshore is part of CIMC Group and is linked to its shipyard, CIMC Raffles, in Yantai, China.

The partners said the structure combines Bluewhale’s asset-management capabilities with OOS Group’s project execution, ship management, and offshore operations expertise, aiming to deliver safe, reliable, and cost-efficient support across the lifecycle of offshore projects.

A core element of the next phase is the introduction of BlueOOS, under which the former OOS International brand will continue its activities with full operational responsibility in the new structure. BlueOOS will operate and manage a fleet comprising three semi-submersible units configured for accommodation and heavy lift, one accommodation-focused semi-submersible unit, and two liftboats. The partners said the organisation’s total contract backlog exceeds $700 million, positioning it as a new market leader in high-end offshore accommodation solutions.

In the period ahead, the focus will be on a disciplined integration process that aligns systems and operating practices while maintaining uninterrupted delivery for ongoing projects. Health, Safety, and Environment will remain the foundation of operations. The joint venture also aims to enhance service quality in key offshore regions, including Brazil, the Asia-Pacific region, and West Africa.