Andreas Giannakogiorgos

Executive Manager – Geotechnical Engineering

BSc, MSc, DIC, CMEngNZ, CPEng, IntPE(NZ)Andreas has worked for over 19 years on numerous large scale civil infrastructure, commercial and residential projects in New Zealand and Greece.

His consultancy work includes advising on realistic, practical solutions to often problematic ground conditions and the interactions of soils, foundations and structures. He has successfully led and managed teams for notable projects such as the Kawarau Falls Bridge (NZTA), the Egnatia Odos and Patra-Athens-Thessalonika Highway (EYDE-PATHE) in Greece, and numerous individual projects for the Canterbury and Kaikoura earthquake recovery programmes.

Andreas has published several papers on liquefaction susceptibility and ground reinforcement for soils susceptible to liquefaction. He actively participates at a technical and delivery level and in recent years is increasingly involved in forensic and legal work to provide timely, smart designs, applying innovation, intelligent risk and ingenuity on every possible aspect for our clients.


  • Geotechnical Earthquake Engineering and Seismic Design
  • Numerical modelling (FLAC, PLAXIS)
  • Soil-Foundation-Structure Interaction (SFSI)
  • Soil liquefaction and ground treatment
  • Deep and shallow foundations
  • Slope stability analysis and designs for soil and rock slopes
  • Earthworks, retaining structures, MSEW, reinforced soils - embankments
  • Evaluations of site and laboratory testing - material properties (soil and rock mechanics)
  • Rock falls and rock mechanics

Kawarau Falls Bridge

Kenepuru, Porirua - slope stability assessment

Hillsborough, Christchurch - Pile supported reinforced gravel raft detailed design

Giannakogiorgos A., Awad A., Ziotopoulou K. (2017) “Liquefaction susceptibility and triggering potential of the Wakatipu varved lake sediments in Queenstown, New Zealand”, 3rd International Conference on Performance-based Design in Earthquake Geotechnical Engineering (PBD-III) in Vancouver, BC, Canada, from July 16-19, 2017Giannakogiorgos A. (2017) “ Dynamic Characteristic of Lake Wakatipu Silty Sediments”, New Zealand Geotechnical Society Inc (NZGS) - NZ Geomechanics News - Issue June 2017Giannakogiorgos A., Papathanasiou G., Vautherin E. (2015) “Quantitative assessment of liquefaction potential in selected areas in Christchurch, New Zealand”, 6th International Conference on Earthquake Geotechnical Engineering (6ICEGE) in Christchurch, New Zealand, 1-4 November 2015Giannakogiorgos A., Nallarulanantham T., Iyathurai S. (2015) “Ground Reinforcement with Shallow Timber Piles for Soils Susceptible to Liquefaction”, 12th Australia New Zealand Conference on Geomechanics (ANZ 2015), Wellington, New Zealand