Xavier Gruz started his carrier in engineering consultancies as a project manager, thenjoined the project management team for two motorway construction projects in Haute-Savoie. He subsequently conducted economic studies for various infrastructure projects and worked on public transport development in urban areas.
In 1999, he joined Réseau Ferré de France (RFF) in Besançon, where he served as technical lead for the high-speed rail line LGV Rhin-Rhône. He oversaw the project until its commissioning, first as mission lead and later as project director.
In July 2012, he joined the EOLE team (western extension of the RER E line) as sole project director for SNCF Réseau.
On 1 December 2024, Xavier Gruz joined EDF’s Nuclear Programmes Division as director of operations.
Since 1 June 2025, he has served as EDF Group’s director of nuclear programs. He is a graduate of the École des Ponts et Chaussées.