CoreMarine and Jumbo Offshore will perform the transport and installation of the soft-yoke (SSY) mooring systems, and hook-up of both the Hilli Episeyo FLNG and MKII FLNG vessels. This will take place in Argentina’s Golfo San Matías.
The contract has been awarded by Southern Energy S.A. (SESA), supported by an international consortium comprising Pan American Energy, YPF, Pampa Energía, Harbour Energy, and Golar LNG. The award represents a major milestone for both companies as well as a breakthrough project for Argentina’s gas sector as it ramps up in export capabilities.
Also read: Jumbo completes mooring line installation offshore Guyana
Integrated project delivery
CoreMarine and Jumbo Offshore will deliver the project through a fully integrated execution model that combines project management engineering, transportation, offshore installations and hook-up. As lead contractor, CoreMarine will contract Jumbo Offshore to transport and install the SSY mooring system including heavy-lift and piling activities.
Jumbo Offshore already has extensive experience with soft-yoke installations in Brazil and Cameroon. CoreMarine will follow-up with diving and construction activities including spool installation, ballasting, riser hook-up, pre-commissioning, positioning and hook-up of both FLNG units.
Also read: Intermoor and Jumbo form offshore energy alliance
Complex, simulateous operations
The offshore campaign will involve complex, simultaneous operations including heavy lifting, riser installation, piling, spool installation, saturation diving, and multi-vessel simultaneous operations (SIMOPS). The project will require the chartering of multiple assets including diving support vessels (DSVs), support vessels and station keeping tugs.
Ben Fitzgerald, CEO of CoreMarine: ‘Projects like this are at the top end of offshore construction complexity. Moving, positioning, and permanently installing floating assets of this scale demands absolute precision, proven experience, and flawless execution offshore. This is where CoreMarine and Jumbo Offshore will make a real difference. Our objective is not just to deliver two FLNG installations, but to leave behind strong local capability, confidence, and a proven model for future offshore developments in the region.’
Also read: Jumbo equips heavy-lift vessel with Econowind sails
Weathervaning FLNGs
The SSY systems, supplied by NOV, will enable both FLNG units to weathervane around a single mooring point, aligning with environmental forces and providing a robust, cost-efficient solution that eliminates the need for fixed infrastructure such as jetties.
CoreMarine and Jumbo Offshore both commenced project management and engineering in January 2026. The Hilli Episeyo FLNG is scheduled for installation in 2027, followed by the MKII FLNG in 2028, marking the first application of SSY technology in Argentine waters. This project represents CoreMarine’s first FLNG development and largest contract in Latin America, while further strengthening Jumbo Offshore’s track record in SSY installations and floating energy infrastructure.
Photo by Jumbo Offshore.
