Soletanche Bachy - Agence Sud Est - Ingénieur travaux Rueil-Malmaison 2013 - 2014 Projet Bassin Jules Guesde - Marseille (Marché public 12,5M) Gestion contractuelle du marché Management équipe encadrement ... Croizet Pourty - Vinci Construction - Assistant Ingénieur Travaux - Stagiaire. Finally, there is the entry of Soletanche Bachy into the Vinci Group, which should be confir-med over the coming weeks, if as we hope, the ongoing administrative procedures conclude favou-rably. It is a clear recognition by the world's leading construction company, of the industrial quality of our Group and of the professionalism of our people. 25 January 2007 - Acquisitions. VINCI is to acquire 81% of the capital of Solétanche (parent company of Solétanche Bachy) from its historical family shareholders, increasing its holding to 100%. Solétanche Bachy is one of the world leaders in special foundations and soil improvement. It provides its public and private sector customers with.