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GTT

Designs membrane LNG containment systems

Engineer Intern - Modeling a ship's behavior at sea

Spring 2027Updated on 10/23/2026
No salary listed
Internship
Master's
Saint-Rémy-lès-Chevreuse, France
In PersonOn-site in Saint-Rémy-lès-Chevreuse; free shuttles run from Saint-Rémy-lès-Chevreuse and Versailles Chantiers stations.
Mechanical EngineeringDesign Engineering

About the job

Requirements
  • Knowledge of materials and structural mechanics.
  • Knowledge of Abaqus.
  • Knowledge of Python and Excel.
  • Ability to work autonomously, make proposals, and remain open-minded.
  • Ability to present and defend technical work to stakeholders with varied profiles.
  • A Master 2 or engineering-school background, preferably in mechanical research and development, is preferred.
  • A strong interest in materials mechanics and numerical simulation is expected.
Responsibilities
  • Become familiar with finite-element calculation methods and regulations for ships, including modeling, defining load cases, preparing model data, and interpreting results.
  • Perform finite-element modeling of ship structures.
  • Apply the methods to a liquefied-natural-gas-powered container ship.
  • Correlate study results with existing results.
  • Document and consolidate the work by writing a methodology.
  • Apply the methods to other ship types, including LNG carriers and bulk carriers.
  • Conduct a study of an LNG-powered container ship subjected to various loads, including waves, tank pressures, and ballast loads, and correlate it with existing results to improve the reliability of the studies.
Desired Qualifications
  • A background in mechanical research and development is preferred.

About the company

GTT designs and licenses membrane containment systems for LNG storage and transportation, serving shipbuilders, shipowners, and energy companies. Its membrane technology lines LNG tanks to safely hold cryogenic LNG, with licensing supported by technical assistance and digital optimization services. The company differentiates itself through a patented LNG-specific containment focus, a global network of partnerships, and a service ecosystem that includes maintenance and training in addition to licensing. Its goal is to maintain leadership in the LNG sector by expanding internationally and delivering reliable containment solutions and related services.

Company Size

501-1,000

Company Stage

IPO

Headquarters

Saint-Rémy-lès-Chevreuse, France

Founded

1965

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Simplify's Take

What believers are saying

  • GTT booked 65 orders in H1 2026, including 56 LNG carriers.
  • The June 2026 order book reached 306 units, including four FLNGs.
  • September 2026 launches add LNG Performance Centre, 2 barg tanks, and FuelEU trading tools.

What critics are saying

  • GTT depends on Korean and Chinese shipyards for most licensing revenue by 2028.
  • FuelEU Maritime and EU ETS penalize fossil LNG operations through 2030.
  • If KC-1 or other yard-built alternatives gain approvals, GTT loses royalty pricing power.

What makes GTT unique

  • GTT controls over 90% of large-scale LNG containment, backed by 50 years.
  • Gastech 2026 AiPs from ABS, BV, CCS, DNV, and LR validate GTT designs.
  • GTT Marine fuses Danelec, Ascenz Marorka, and Vessel Performance Systems into one platform.

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Benefits

  • Paid Vacation
  • Remote Work Options
  • Commuter Benefits
  • Meal Benefits

Company News

Yahoo Finance
Oct 23rd, 2026
GTT sets new chairwoman Catherine Ronge's fixed pay at $395,500 a year

Gaztransport & Technigaz (GTT) has set the pay for Catherine Ronge, who will become chairwoman of its board of directors on November 16, 2026. She replaces Philippe Berterottière, who is resigning as chairman and director. The board agreed a fixed annual lump sum of €350,000, separate from any pay as a director. It set the figure based on her experience and expertise, and in line with the current chairman's remuneration policy. For 2026, the pay will be prorated from her start date. Ronge will receive no annual or long-term variable pay, and no termination or non-compete benefits. She may join the company's supplementary health insurance scheme and, where applicable, its welfare and disability schemes.

SWZ Maritime
Oct 14th, 2026
Is a hybrid-electric 200,000 m3 LNG carrier feasible?

Is a hybrid-electric 200,000 m3 LNG carrier feasible? Lloyd's Register (LR), Shell and GTT have launched a joint development project (JDP) to develop a conceptual 200,000 m3 LNG carrier. The vessel combines hybrid-electric propulsion with GTT NEXT1 cargo containment technology. By bringing together a larger-capacity vessel concept with hybrid-electric propulsion and GTT NEXT1 cargo containment technology, the partners aim to explore how future LNG carrier designs could transport more cargo, operate more efficiently and provide greater flexibility as industry requirements continue to evolve. Under the JDP, the partners will work on the development and safety verification of the vessel's hybrid-electric propulsion system, focusing on system architecture, redundancy philosophy and battery integration, while also exploring the commercial evaluation from a total cost of ownership (TCO) model. In parallel, the integration of GTT NEXT1 cargo containment technology will be assessed as part of the overall vessel concept. Technical guidance. The project will also establish technical requirements and guidance for hybrid-electric propulsion in LNG carrier applications, helping to support further technical understanding of the technology. Constantinos Chaelis, Global Gas Segment Director, LR: 'The industry is under increasing pressure to move more energy with lower emissions and greater operational flexibility. Larger vessel concepts are being assessed for their potential, and this project will explore how hybrid-electric propulsion and cargo containment technology can support their technical and operational performance from a TCO perspective.' Picture: From left to right - Stephen Brown, Technology Manager, Shell; Francois Michel, CEO of GTT; Andrew McKeran, Chief Growth Officer, LR (photo LR).

MarineLink
Oct 13th, 2026
Lloyd's Register, Shell, GTT to develop hybrid-electric LNG carrier.

Lloyd's Register, Shell, GTT to develop hybrid-electric LNG carrier. October 13, 2026 (l-r) Stephen Brown, Technology Manager, Shell; Francois Michel, Chief Executive Officer of GTT; Andrew McKeran, Chief Growth Officer, Lloyd's Register. (C) LR Lloyd's Register (LR), Shell and GTT have launched a Joint Development Project (JDP) to develop a conceptual 200,000m^3 LNG carrier combining hybrid-electric propulsion with GTT NEXT1 cargo containment technology. By bringing together a larger-capacity vessel concept with hybrid-electric propulsion and GTT NEXT1 cargo containment technology, the partners aim to explore how future LNG carrier designs could transport more cargo, operate more efficiently and provide greater flexibility as industry requirements continue to evolve. Under the JDP, the partners will work on the development and safety verification of the vessel's hybrid-electric propulsion system, focusing on system architecture, redundancy philosophy and battery integration, while also exploring the commercial evaluation from a total cost of ownership (TCO) model. In parallel, the integration of GTT NEXT1 cargo containment technology will be assessed as part of the overall vessel concept. The project will also establish technical requirements and guidance for hybrid-electric propulsion in LNG carrier applications, helping to support further technical understanding of the technology.

IndexBox
Sep 23rd, 2026
GTT Energy unveils liquefied gas shipping innovations at Gastech 2026.

GTT Energy unveils liquefied gas shipping innovations at Gastech 2026. GTT Energy, the group unit responsible for containment and energy management systems, used Gastech 2026 to showcase a collection of innovations intended to boost the economic, energy and environmental results of liquefied gas shipping, according to GTT. In a press release dated 15 September 2026, the unit introduced two offerings. One is a next-generation containment solution for liquefied natural gas fuel, built to strengthen a vessel's overall economic performance. The other is the LNG Performance Centre, a new service ecosystem for LNG carriers meant to give ship-owners, charterers and crews clearer insight into vessel operations. That centre combines three fields of expertise: cargo management, voyage optimisation and monitoring of containment system performance. In addition to those two announcements, GTT showcased other work that reflects its stated dedication to ongoing innovation in LNG and ethane transportation and environmental performance. LNG carrier developments. For a 174,000 cubic metre LNG carrier fitted with GTT NEXT1 membrane technology, GTT and Hudong-Zhonghua secured Approvals in Principle from the American Bureau of Shipping, Bureau Veritas, China Classification Society, DNV and Lloyd's Register. The design offers a guaranteed boil-off rate of 0.07 percent, enhancing overall vessel efficiency. A Joint Development Project was announced by GTT, Shell and Lloyd's Register for a conceptual 200,000 cubic metre LNG carrier pairing hybrid-electric propulsion with GTT NEXT1 cargo containment technology. The concept seeks to explore ways to raise LNG carrying capacity, improve operational efficiency and provide flexibility for evolving regulatory requirements. From Lloyd's Register, GTT obtained an Approval in Principle for a 7.5-year dry-docking interval for LNG carriers using GTT membrane containment systems, longer than the standard five-year interval. This extended maintenance window could raise vessel availability while cutting maintenance needs and related costs, without weakening safety or reliability standards. A study by GTT and Lloyd's Register Advisory confirmed that 200,000 cubic metre LNG carriers are compatible with most existing LNG terminals. The results support the possibility of increasing cargo capacity and transportation efficiency without fundamental changes to existing terminal infrastructure. Ethane transportation. To develop and technically assess a 150,000 cubic metre ultra-large ethane carrier using GTT's Mark III Slim technology, GTT, HD Hyundai Heavy Industries and Lloyd's Register started a Joint Development Project. The effort targets the needs of a new generation of higher-capacity ethane carriers. An Approval in Principle from DNV was granted to GTT and Hudong-Zhonghua for a 100,500 cubic metre very large ethane carrier fitted with GTT's NO96 Super+ containment system. The vessel also includes a bi-oblique number four tank intended to optimise available space and maximise cargo capacity. Environmental footprint. Following an earlier Approval in Principle from Bureau Veritas at SMM 2026, GTT received an Approval in Principle from Lloyd's Register for its 2 barg membrane technology, designed specifically for container ships. Created to address shore-power operation and increasingly strict environmental requirements, the solution extends holding time in port with minimal or no gas consumption. An insulation solution using hydrofluoroolefins with better thermal performance, developed by Dongsung Finetec, passed all qualification and certification stages under GTT's evaluation process. This milestone aids GTT's shift away from hydrofluorocarbon blowing agents toward very low global warming potential alternatives used in its membrane containment technologies.

All About Shipping
Sep 21st, 2026
150,000 cbm ULEC project targets larger-scale ethane transport with GTT technology.

150,000 cbm ULEC project targets larger-scale ethane transport with GTT technology. September 21, 2026 0 views New 150000 cbm ULEC project targets larger-scale ethane transportation with GTT's latest cargo containment system HD Hyundai Heavy Industries, GTT and LR have launched a joint project to develop a 150,000 cbm ultra-large ethane carrier, exploring the next step in large-scale ethane transportation. Lloyd's Register (LR), HD Hyundai Heavy Industries (HHI) and GTT have signed a joint development project (JDP) agreement to develop and technically assess a 150,000 cbm ultra-large ethane carrier (ULEC), incorporating GTT's Mark III Slim design. Announced at Gastech 2026 in Bangkok, the project will bring together HHI's shipbuilding expertise, GTT's cargo containment technology and LR's classification and technical assurance capabilities to develop and review the vessel design in accordance with LR Rules. The 150,000 cbm ULEC concept is the largest vessel design for the ethane carrier segment. As ethane trade volumes continue to grow and voyage economics become an increasingly important consideration for operators, the industry is exploring larger vessel concepts capable of transporting greater cargo volumes while maintaining high standards of safety, operability and efficiency. Through the JDP, the partners will evaluate the technical challenges and opportunities associated with scaling ethane carrier capacity to 150,000 cbm. The project will focus on vessel design development, cargo containment integration, safety considerations and compliance with applicable classification and regulatory requirements. The collaboration aims to establish a robust technical foundation for future ultra-large ethane carrier projects while providing greater understanding of the design, operational and safety considerations associated with vessels of this scale. Constantinos Chaelis, Global Gas Segment Director, LR, said: "As the ethane trade expands, owners are looking for larger and more efficient vessel concepts that can deliver operational and commercial advantages without compromising safety or reliability. "This collaboration provides an opportunity to apply our advanced gas carrier expertise to the development of a credible and technically robust 150,000 cbm ULEC concept that helps establish a clear technical pathway for future projects in this segment." Hongryeul Ryu, Chief Technology Officer, HHI, said: "HHI has continuously pursued technological innovation, with optimized ship designs tailored to operating conditions and customer requirements serving as one of its core design values. "This JDP is founded on the same design philosophy and aims to introduce a new solution that enhances both vessel performance and economic efficiency. "HHI's 150,000 cbm ULEC, incorporating the MARK III SLIM design, is expected to become a next-generation vessel that achieves both weight reduction and improved performance. Furthermore, this project is anticipated to represent an important milestone in establishing a new paradigm for ship design through the application of the latest cargo containment system (CCS)." François Michel, Chief Executive Officer, GTT, said: "Thanks to the versatility of our technologies, we can deliver greater efficiency across ethane transportation. With Mark III Slim, this translates into increased cargo capacity and shorter vessel construction times. GTT, HD Hyundai Heavy Industries and Lloyd's Register share the ambition and responsibility to advance a new generation of increasingly efficient vessels that maintain the same rigorous standards of safety, reliability and industrial compliance."