Born on September 13, 1963, in Ozouer le Voulgis, southeast of Paris. He married Sophie Merceron-Vicat, with whom he had five children. In 1984 he graduated as an engineer of the French Navy School and became a naval officer. He left active service in 1999, after commanding nuclear attack submarine Perle, and joined the Vicat group as cement plant engineer. In 2001 he was appointed manager of the Ragland cement plant in Alabama, United States. In 2002 he was appointed CEO of National Cement, the holding company for the Group's American businesses. In 2004 he returned to France as Group COO, and he became CEO in 2008. On the proposal of Chairman Jacques Merceron-Vicat, Guy Sidos was appointed Chairman and CEO of the Vicat group at the Annual General Meeting of May 6, 2014.