From rockets to rail: Martin Sion becomes Alstom’s new CEO

Luc Joris

October 10, 2025

Martin Sion will step down as president of ArianeGroup to head Alstom in April /ArianeGroup

Starting in April, Martin Sion, currently executive chairman of European aerospace company ArianeGroup, will become the new CEO of French railway manufacturer Alstom. Sion will replace Henri Poupart-Lafarge, the current CEO. Poupart-Lafarge, who has been CEO of Alstom since 2016, announced in May th
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