DFI is an international association whose members are geoprofessionals involved in the design and construction of deep foundations, excavations and tunneling. These project owners, general and specialty contractors, consulting and design engineers, equipment and material manufacturers and suppliers, educators and students gather at conferences, seminars and in committee meetings to network, educate, communicate and collaborate. In these forums they work together to share knowledge and improve the design and construction of projects with complex geotechncial conditions.