Who We Are

Gall Zeidler Consultants is a worldwide leader in geotechnics, tunnel design, tunnel engineering as well as tunnel construction and program management.

We use our wide range of expertise in transportation, infrastructure, water conveyance, and mining projects to help our clients overcome difficult ground conditions and to provide a superior product from its first conceptual phases to its turn-key completion. We excel in providing tailor made solutions for urban tunneling projects with shallow overburden by innovatively combining conventional (SEM / NATM / SCL), cut-and-cover, and mechanical (TBM) tunneling methods with state-of-the-art ground improvement and waterproofing techniques. Our solutions ensure that neighboring structures and surface operations are protected and that the new underground scheme will serve its purpose for the required lifetime.

Our service portfolio extends from inception-level tasks, such as the preparation of feasibility studies, through the development of detailed tunnel designs and contractual documents, to construction management and site support services. This combined expertise places us in a unique position to carry out program management services for complex infrastructure projects. We provide our services for a wide variety of facilities, ranging from hydro-power systems in remote mountainous settings to complex transit structures in challenging, over-built urban areas. As a result of our extensive experience, our specialists are often selected to serve on expert review panels dedicated to the investigation and improvement of tunneling methodologies and thus structures.

Our involvement in many international projects has led to our nomination for several industry awards in recognition of the innovation and quality of the service that we provide. With decades of experience, we currently have the privilege of looking at a history of over 300 miles of completed tunneling projects across the Americas, Europe, Asia, Australia and Africa and are looking forward to completing many more.

Explore our nine offices across four continents and get in contact with us.

Meet Our Team

Find out more about GZ’s key personnel, its dedicated management and their outstanding experience in the design and engineering of tunnels and underground construction worldwide.

Our Team