Dr. Giorgio Höfer ZT GmbH was founded in February of 2023.
Main target of the company is to perform excellent consultancy services in hydrogeology and geology in tunnelling.

Vision and Values

Dr. Giorgio Höfer ZT GmbH was created to contribute for a better life for our children on a better earth.
We live and work CO2 neutral.
We support human rights and do not support systems disregarding those.
Working in geology, we perform a seamless conclusion between regional geology, landscape evolution and the geology in project scale.
We work objective, incorruptible, orientated in facts and solutions.

Services 

Projects

- Water supply
- Groundwater protection
- Hydroelectric power plants
- Rail-bound infrastructure
- Projects for transport or storage of renewable energy
- Renaturation
- Geothermal energy

Publications

• 2023, Hilberg, S.; Höfer-Öllinger, G. & Leis, A. (Hrsg): SINA 2023 19th Stable Isotope Network Austria Meeting. Program and Abstracts
• 2023, Spötl, C.; Höfer-Öllinger, G.; Hirtner, G. & Zhang, H.: The Brunnstollen in the Mönchsberg of the city of Salzburg and ist speleothems
• 2022, Filipponi, M., Bauer, S., Höfer-Öllinger, G. & Jörin, U.: Karst nomenclature for engineers and engineering geologists
• 2023, Orellana, R.; Höfer-Öllinger, G.; Ulloa, J.C.; Flores Bertoglio, A.: Las Leñas International Tunnel – Geomechanical challenges in large-scale tunneling projects across the Andes
• 2022, Höfer-Öllinger, G.: Future Management of Groundwater in Alpine Valleys
• 2021, Kessler, T.; Marschallinger, R. & Höfer-Öllinger, G.: Rising groundwater levels is challenging future groundwater management in alpine valleys
• 2021, Keuschnig, M.; Schober, A.; Delleske, R.; Brandner, K.; Höfer-Öllinger, G.: Scale-oriented landslide monitoring and early warning system for uranium legacy complexes in Mailuu Suu, Kyrgyzstan
• 2021, Höfer-Öllinger, G.: Isotope hydrogeological investigations in the Southern Salzburg Basin, Austria
• 2020, Weichenberger, F.P.; Schwaiger, C. & Höfer-Öllinger, G.: From geological mapping to representation in BIM
• 2020, Höfer-Öllinger, G.: Karst hydrogeological investigations in Salzburg, Austria
• 2019, Höfer-Öllinger, G.: Hydrogeology of Crystal Rocks in the Planning and Construction of Underground Structures
• 2019, Pointner, P. & Höfer-Öllinger, G.: Geological on site tests
• 2019, Gröbner, K.; Gadermayr, W.; Höfer-Öllinger, G.; Huemer, H. & Spötl, Ch.: Karst hydrogeology of Lamprechtsofen (Leoganger Steinberge, Salzburg)
• 2019, Höfer-Öllinger, G. & Weichenberger, F.: Innovative management of geological data as a tool for safe tunnelling
• 2017, Meyer, U.; Zagler, G. & Höfer-Öllinger, G. : Hydrology of Riesending-Schachthöhle
• 2016, Höfer-Öllinger, G.: The terraces edges of the city of Salzburg and their impact on groundwater dynamics
• 2016, Höfer-Öllinger, G.; Gadermayr, W.; Zagler, G.; Butschek, M.: The role of the catchment elevation on the discharge behaviour during the flood event of June 2013, recorded in caves and by karst springs in the province of Salzburg.
• 2016, Lechner, K.; Spötl, Ch.; & Höfer-Öllinger, G.: Karst hydrogeology of the Kitzsteinhorn massif (Hohe Tauern, Salzburg)
• 2017, Austrian Society of Geomechanics, Guideline for acquisition of geological and geotechnical parameters for deep tunnels.
• 2022, Austrian Society of Geomechanics, Recomendations for geological face mapping.
• 2015, ITA Working Group 2 Research: Strategy for Site Investigation of Tunnelling Projects.