Gall Zeidler Consultants

Ashburn, Virginia (Va) – Gall Zeidler Consultants (GZ) is a worldwide leader in geotechnics, tunnel engineering and tunnel construction management, with special expertise in transportation and infrastructure projects. Our company specializes in mastering difficult ground conditions by utilizing various methods, including dewatering, grouting and ground freezing. We also specialize in tunneling under shallow overburden and protection of neighboring structures by innovatively combining conventional (NATM) and mechanical (TBM) tunneling methods with ground improvement and state of the art waterproofing techniques.