ENGIE is a major energy utility company (approximately 150 000 employees worldwide) providing highly efficient and innovative energy and services solutions to residential, commercial and industrial customers. Willing to take a lead within the Energy Transition in Europe, ENGIE is highly involved in the development of sustainable and renewable energies from their production to their uses in cities and territories. In this context, ENGIE consider hydrogen as a promising energy carrier, that may on one hand provide a huge flexibility to energy system in order to optimize renewables integration, and on the other hand, support the development of efficient and green energy uses at centralized or decentralized level. Within the ENGIE company, ENGIE Lab CRIGEN, corporate R&D center of ENGIE is dedicated to new gases and energies. ENGIE Lab CRIGEN conducts operational R&D projects and develops pilots for the Business Units, corporate entities of ENGIE and external customers, in an effort to master tomorrow’s technologies, bring them to maturity, and prepare the Energy Transition.