Gaztransport & Technigaz SA is a technology and engineering company that provides cryogenic membrane containment systems for the maritime transportation and storage of liquefied gases in South Korea, China, and internationally. It operates through the Core Business and Hydrogen segments. Its offerings include onshore membrane storage tank solutions for LNG, LNG floating storage, and solutions for transporting and storing other liquefied gases such as ethane, ethylene, propane, butane, and propylene. It also provides offshore LNG solutions including FSRUs, FLNGs, and FSUs, along with consultancy, engineering studies, operational support, and maintenance and repair of GTT membrane systems. The company sells decision-making support tools for ship-owners and operators, designs and assembles electrolysers for green hydrogen production from renewable energy, and adapts containment technology for LNG-fuelled vessels. It serves ship-owners, gas companies, terminal operators, and shipyards, and was founded in 1963 with headquarters in Saint-Rémy-lès-Chevreuse, France.