Gaztransport et Technigaz is a French engineering company that specialises in containment systems for liquified natural gas (LNG) in shipping and storage. It offers services such as consultancy, engineering studies, membrane tank maintenance services, digital solutions and training. The company runs its own test laboratory and is actively working on new technologies for LNG containment, solutions for other liquefied gases, and applications for the growing market of LNG as a propulsion fuel.