Bouygues SA, the French construction giant and telecom-media firm, has named its first non-family member as CEO—elevating current deputy chief Olivier Roussat, who also had been chairman of its telecom unit, to succeed Martin Bouygues. Roussat had been in the deputy role since 2015.

Martin Bouygues, a son of the contractor's late founder Francis Bouygues, remains chairman and had served in both roles since 1989, as his father did since the firm began in 1952.