E&T at a glance

Air Liquide Engineering & Technologies brings together the Air Liquide Group expertise in technology, engineering, and manufacturing to design and deliver cutting-edge industrial solutions for a low-carbon future.

Welcome to Air Liquide Engineering & Technologies 

Air Liquide Engineering & Technologies (E&T) seamlessly integrates project development, construction, and operational execution to design and deliver cutting-edge industrial solutions for the Air Liquide Group and external customers.

With a unique portfolio of technologies, E&T offers a wide range of solutions to accompany the growth and meet the evolving needs of our customers, from the design of industrial gas production units to the manufacture of cryogenic equipment for space and energy applications, as well as low-carbon technologies such as electrolyzers and CO₂ capture solution or technologies for the semiconductor industry.

  • + 5000 employees worldwide

  • +70 nationalities

  • 855 million euros in third-party sales in 2025

  • 3% of Group revenue in 2025

Our expert entities 

Leveraging collective expertise for a low-carbon future

Building on a strong "one team mindset", uniting our specialized entities allows us to seamlessly blend our innovative, proprietary technologies with world-class operational execution.

  • Air Liquide Engineering & Construction (E&C)

    Designs, engineers, and builds the Group’s production units, mainly air gas separation and renewable and low-carbon hydrogen plants. For external customers, E&C provides efficient, sustainable, and customized engineering, technology, and process solutions.

  • Air Liquide advanced Technologies (AL-aT)

    Dedicated to deep tech and extreme environments, providing cutting-edge gas engineering and cryogenics for space, science, and the maritime sector.

  • Capital Implementation (CI)

    Acting as the Owner Representative, they steer the project portfolio management and ensure the flawless execution of the Air Liquide Group's investments. They guarantee that every project strictly meets expectations regarding cost, schedule, quality, safety, and reliability.

  • Air Liquide Electronics Systems (ALES)

    Developer of innovative, high-tech solutions for the blending and distribution of specialty gases and chemicals, serving the electronics industry (semiconductors, photovoltaics, flat panels) and the energy distribution market. ALES also acts as the internal supplier for the Equipment & Installations (E&I) activity within the Air Liquide Group's Electronics business line.

  • Cryolor

    Specialized in the design and manufacturing of high-performance, reliable, and durable cryogenic transport and storage equipment for the healthcare and industrial sectors (liquid oxygen, nitrogen, argon, hydrogen, LNG).