Soletanche Bachy, a subsidiary of Soletanche Freyssinet and part of the Vinci Group, is the world's leading geotechnical specialist. Formed in 1997 through the merger of Soletanche (founded 1947) and Bachy (founded 1927), the company boasts over 10,000 employees and operates in approximately 60 countries through 80 subsidiaries and branches. Soletanche Bachy offers a comprehensive range of geotechnical solutions, including deep foundations, ground improvement, cut-off walls, and earth retention, serving as both a general contractor and specialized subcontractor for projects like tunnels, dams, and transportation infrastructure.