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About Us
Our Mission
We combine advances in uncertainty analysis, cyber-physical systems modeling and new resilience design approaches to deliver Water Infrastructure solutions for a changing world.
PEOPLE
Georgia Kandilioti
Georgia Kandilioti is the founder and CEO of TETHYS. She is an Environmental Scientist specializing in water resources and environmental management and engineering with over 12 years experience.
Georgia Kandilioti
Georgia Kandilioti is the founder and CEO of TETHYS.
She is an Environmental Scientist specializing in water resources and environmental management and engineering with over 12 years experience.
She received her BSc in Environmental Science from the University of the Aegean and her MSc in Water Resources Science and Technology from the National Technical University of Athens (NTUA).
During her research and professional career in the Hellenic Centre for Marine Research (HCMR), the National Technical University of Valencia, the UK Environment Agency (EA), the National Technical University of Athens and engineering consultancies in Greece, she has gained experience in a wide range of topics, from water modelling and environmental data collection and analysis to Regulatory Water Frameworks, EU Environmental Directives and Guidelines, multi-disciplinary team management and stakeholder communication and engagement.
During her work, Georgia has cooperated with clients, local stakeholders and environmental regulators on the design and implementation of water related plans and projects in Greece, Spain, Cyprus, Norway and the UK.
Ioannis Tsoukalas
Dr. Ioannis Tsoukalas holds a Ph.D. in Civil Engineering, NTUA (2018), in the domain of stochastic simulation and optimization water-systems under uncertainty.
Ioannis Tsoukalas
Dr. Ioannis Tsoukalas holds a Ph.D. in Civil Engineering, NTUA (2018), in the domain of stochastic simulation and optimization water-systems under uncertainty.
He has obtained a Diploma in Civil Engineering from Aristotle University of Thessaloniki, Greece (March 2010) and a M.Sc. in Water Resources Science and Technology from National Technical University of Athens, Greece (NTUA) in March 2012.
He has worked as a senior researcher in several National (KLIMENESTOS, ALPINE, PROCRUSTES), and European (STOP-IT; as a WP leader, EIFFEL, iWidget, DESSIN, PEARL) projects, as well as a consultant in a wide range of engineering studies.
His work focuses on the development of a) statistical/stochastic methods and models for the analysis, modelling, forecasting, and (multi-scale) simulation (and disaggregation) of stochastic processes (e.g., hydrometeorological), and b) surrogate-based optimization algorithms, (inspired from the recent developments in machine learning) with a focus on multi-objective problems.
His research contributes in improving decision making and risk management under deep uncertainty. He has authored 40 publications to date, from which 18 peer-reviewed papers in international journals and 22 in international conferences.
Panagiotis Kossieris
Dr. Panagiotis Kossieris is a Civil Engineer and Senior Researcher. He holds a Ph.D. in Civil Engineering (NTUA), a M.Sc. in Water Resources Science and Technology (NTUA) and a 5-year Diploma in Civil Engineering (NTUA).
Panagiotis Kossieris
Dr. Panagiotis Kossieris is a Civil Engineer and Senior Researcher. He holds a Ph.D. in Civil Engineering (NTUA), a M.Sc. in Water Resources Science and Technology (NTUA) and a 5-year Diploma in Civil Engineering (NTUA).
His Ph.D. focused on the stochastic analysis and simulation of water demand processes, with emphasis on the development of methodologies and tools for the enhancement of the limited availability of high-resolution data in cost-effective ways.
Dr. Kossieris has participated as senior researcher and project manager in several EU-funded (SUBSOL, iWIDGET, PEARL, Fiware4Water, Water Mining), as well as National-funded (ALPINE, CRESSENDO, E3WDM, Smart Blue Water Camps) projects.
His work focuses on the statistical analysis of large datasets, the stochastic modelling of physical (e.g., rainfall) and non-physical (water demand) processes, as well as the design and development of web analytics and hydroinformatics applications for smart monitoring and management of urban water systems.
He has published 10 peer-reviewed papers in international journals and 16 papers in international conferences. He is a member of the Technical Chambers of Greece and the European Geoscience Union.
Dionysios Nikolopoulos
Dr Dionysios Nikolopoulos holds a Diploma in Civil Engineering, an M.Sc. and a PhD from the National Technical University of Athens (NTUA).
Dionysios Nikolopoulos
Dr Dionysios Nikolopoulos holds a Diploma in Civil Engineering, an M.Sc. and a PhD from the National Technical University of Athens (NTUA).
He has worked in several research projects as senior researcher and applications developer (incl. STOP-IT, NextGen, PEARL, IWIDGET, DESSIN, E3WDM, PROCRUSTES).
His work focuses on hydroinformatics, water cyber-physical systems, cyber-security of water systems, hydraulics, hydrology, and water resources management.
He develops models and tools for the complete urban water cycle under long term uncertainty and integrates cyber control and monitoring systems to physical urban water processes, to assess cyber-physical risks and improve water systems security.
Archontia Lykou
Archontia Lykou is the Chief Operating Officer of Tethys. She is a Civil Engineer specializing in water resources, hydrology and flood risk management with 10 years’ experience in research and innovation projects and consultancy services.
Archontia Lykou
Archontia Lykou is the Chief Operating Officer of Tethys.
She is a Civil Engineer specializing in water resources, hydrology and flood risk management with 10 years’ experience in research and innovation projects and consultancy services.
Before completing her undergraduate studies at the National Technical University of Athens (NTUA) in 2011, she had worked in the field of dam construction.
In parallel with her postgraduate studies on Hydrology and Environmental Water Resources Management at NTUA fulfilled in 2013, she was working on hydraulic studies and design of water infrastructures in the private sector.
In 2013, she started working in various research project at NTUA in the Department of Water Resources and Environmental Engineering.
She has successfully delivered several National and European projects (e.g. B-WaterSmart, STOP-IT, ERMIS-F, PEARL, INEWS etc.) in the domains of water security and environment, working as project manager and contributing to research activities.
Her research interests are mostly related to hydrologic and hydrodynamic simulations of flood phenomena in inland and urban systems, while utilizing GIS technologies and coupled 1D-2D hydrodynamic models for flood risk assessment and suggestion of resilience measures/strategies.
She has co-authored more than 20 journal and conference papers. She also leads Tethys’s consulting services on water and flood risk management in Greece.
Nikos Theodoratos
Dr. Nikos Theodoratos is the Business Development Officer of Tethys. He is a civil engineer with 20+ years of experience, specialized in hydrology, hydraulic modeling, and data analysis.
Nikos Theodoratos
Dr. Nikos Theodoratos is the Business Development Officer of Tethys.
He is a civil engineer with 20+ years of experience, specialized in hydrology, hydraulic modeling, and data analysis.
He has worked in Europe, the U.S., the Middle East, and S.E. Asia, as a researcher, designer, site engineer, and consultant.
He holds a Ph.D. in environmental physics from ETH Zurich, a civil engineering diploma from the National Technical University of Athens (NTUA), and 2 M.Sc. degrees in water resources engineering from the University of Minnesota and the NTUA.
At Tethys, he is responsible for the commercialization and scaling of digital solutions for cyber-physical security of critical water infrastructure.
He supports the execution of EU-funded projects and engages in fundraising and networking to expand the company’s reach.
His previous experience spans large-scale infrastructure projects, hydraulic modeling, flood protection design, geospatial analysis, machine learning, and CFD modeling.
He has conducted research on river dynamics, landscape evolution, and wastewater treatment bioinformatics.
He has led international, interdisciplinary teams and contributed to innovative solutions at the intersection of engineering and data science
His work combines technical expertise with strategic insight to drive innovation and resilience in the water sector.
George Karavokiros
George Karavokiros is an expert in hydroinformatics, knowledge bases, and network modeling, with extensive experience in monitoring and managing environmental data.
George Karavokiros
George Karavokiros is an expert in hydroinformatics, knowledge bases, and network modeling, with extensive experience in monitoring and managing environmental data.
He holds a degree in Computer Science from the University of Karlsruhe (TH), Germany and over the course of more than 30 years, he has demonstrated a strong capacity for interdisciplinary collaboration, contributing to and leading software development projects in water resource management, urban hydraulics, and transportation for both industry and research institutions.
His solid theoretical background, coupled with extensive expertise in modern software technologies, has enabled him to translate innovative methodologies and mathematical models into successful software solutions.
Water Resources Management Study For The Reinforcement Of The External Water Supply System Of Athens, With Reinforcement Of Mornos – Evinos, Municipality Of Delphi, Kopais Region, Asopos, And Marathon
Tethys developed and simulated several water management scenarios for the Athens Water Supply System using the HYDRONOMEAS software in collaboration with Z&A Consulting Engineers.
Supporting advanced uncertainty-aware analysis of flood risks for the Hellinikon Metropolitan Area
Tethys developed advanced stochastic algorithms and models to explore risks and impacts of extreme flood events to the sensitive infrastructure of the lighthouse Hellinikon development.
Supporting the development of a new generation of digital water services for the Dutch construction industry
Tethys provided advice for the digital transformation and hydroinformatic toolkit development of two major Dutch companies (Aveco de Bond and WARECO).
Pilot Project for Assessing Water Losses and Non-Revenue Water in Small Local Water Supply Systems in Cyprus
Tethys developed advanced methodologies and tools to assess water losses and non-revenue water supported the identification of optimal technical solutions for Water Distribution Network upgrades.
extrAIM: AI-enhanced uncertainty quantification of satellite-derived hydroclimatic extremes
In response to the European Space Agency’s (ESA) AI for Science call, Tethys will leverage its suite of in-house tools and software for statistical/stochastic analysis and modelling, and tailor them to cope with the peculiarities of hydroclimatic variables while developing new online platforms and services exploiting satellite products in collaboration with NTUA in Athens (Greece) and CNR-IRPI in Perugia (Italy).
Supporting the development of a Water Master Plan for Crete
Tethys developed GIS analytics, screening tools, and data driven algorithms to simulate and assess flood risks at a regional scale and support prioritization of suitable measures by local authorities.
2nd Revision of the Water Resources Management Plans Of The River Basins In The 14 River Basin Districts Of Greece According To Specifications Of The E.U. Directive 2000 /60/Ec. Section 1: "2nd Revision Of The Management Plan Of River Drainage Basins Of The Aquatic Divisions Of Western Peloponnisos (EL01), Northern Peloponnisos (EL02) And Eastern Peloponnisos (EL03)"
Tethys collaborated with Hydroexigiantiki Consulting Engineers and Z&A Consulting Engineers to conduct evaluations of surface water body status, water demand, pressures and exemptions determination, ensuring regulatory compliance and promoting sustainable water management practices according to Water Framework Directive (WFD). We also supported the hydrological analysis, collecting, organizing and processing hydrological data, calibrating models, simulating rainfall-runoff scenarios, setting up and validating the MIKE HYDRO BASIN model and conducting simulations for future projects and climate change.
General Strategic Plan For Flood Protection In Western Thessaly (Masterplan - 1st Phase)
Tethys participated in the Hydrological Simulation of main sub-basins of the Upper Pinios River.
Argus Water Data Platform Development
Tethys collaborated with WINGS ICT Solutions to develop the ARGUS Water Data Platform for the Dutch Engineering Firm AVECO. ARGUS helps monitor and improve the quality of groundwater data and to use it in smarter more productive ways.
Water Consultant Services For South Africa
Tethys helped develop Terms of Reference for the Procurement of Transaction Advisory services for Project Preparation of Water Reuse projects under the Water Reuse Programme of South Africa.
2nd Revision Of River Basin Management Plans Of The Water Districts Of Western Sterea Ellada (EL04) And Thessaly (EL08)" And "2nd Revision Of River Basin Management Plans Of The Water District Of Epirus (EL05)"
Τethys supported the hydrological analysis (incl. collecting, organizing, and processing hydrological data, calibrating models, simulating rainfall-runoff scenarios, setting up and validating the MIKE HYDRO BASIN model and conducting simulations for future projects, climate change in accordance to WFD).
Water Europe MarketPlace+
Tethys works to enhance the WE Marketplace with targeted features and improvements, supporting Water Europe's vision for a Water-Smart society.