ArianeGroup, jointly owned by Airbus and Safran, said its board has appointed Christophe Bruneau as chief executive officer, effective April 1, succeeding Martin Sion.
Bruneau joins ArianeGroup from Safran Aircraft Engines, where he has served since 2020 as executive vice president and general manager of the Military Engines division. His appointment follows Sion’s earlier decision not to seek renewal of his mandate, which ArianeGroup announced on Oct. 8, 2025.
Sion, who took the helm in April 2023, oversaw the long-awaited introduction of the Ariane 6 rocket in July 2024 and its first full year of operations in 2025, including four Ariane 62 flights. Before stepping down at the end of March, he is expected to oversee the first flight of the heavier-lift Ariane 64, scheduled for Feb. 12.
While Sion’s tenure of nearly three years was relatively brief, it aligns with recent leadership patterns at ArianeGroup. Since the company’s formation in 2015, its chief executives have served terms of roughly four years. Founding CEO Alain Charmeau led the group for four years before André-Hubert Roussel took over in 2019, a period marked by repeated delays to Ariane 6. Roussel was replaced by Sion in 2023, just over a year before the rocket’s inaugural launch.
The turnover contrasts with broader international norms. Data from Russell Reynolds Associates show the average tenure of an incumbent CEO globally stood at about 7.2 years in 2025.
With Ariane 6 now operational and the company focused on scaling toward its targeted launch cadence, ArianeGroup appears to be entering a more stable phase. That could provide Bruneau, 58, with the opportunity to extend leadership continuity and move closer to global averages for CEO tenure as the European launcher seeks to consolidate its return to regular operations.
