The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
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Guillaume at Ariane 5 launch pad.
Guillaume Galateau, ESA Launcher System Engineer is responsible for ESA’s assessment of the first Ariane 6 launcher (built by prime contractor ArianeGroup) and mission flightworthiness, enabling ESA, as launch operator, to authorise the launch at liftoff.
His job is an ongoing task to challenge the justification for launcher flightworthiness including launcher items, stage structures, pyrotechnical separation systems, propulsion systems, avionics and software systems. Throughout a launch campaign that includes launcher integration, preparation, checks and assessing technical files based on mission risk assessment. Most of the time, additional justifications are required before flight due to hardware production discrepancies or specific needs for a mission. Necessary relevance relies on competencies and experience.