About 4EE
A boutique consultancy for the energy transition
Fourth Element Energy (4EE) is a specialist engineering consultancy operating at the intersection of geotechnical engineering, energy systems, and sustainable infrastructure.
Our mission
We deliver expert engineering advice and design services for geothermal systems that enable the low-carbon built environment. Our work spans feasibility studies, system design, thermal testing, and technical advisory for projects of all scales.
Our approach
We combine rigorous academic research with practical engineering expertise. Our boutique model ensures that every project receives direct involvement from our senior engineers, delivering the highest standards of technical excellence and innovative problem-solving.
Our expertise
4EE operates at the intersection of multiple engineering disciplines, bringing together expertise that is rarely found in a single consultancy.
Research-Informed Practice
Our work is grounded in cutting-edge research, with our team actively contributing to advances in geothermal engineering science through academic publications and industry collaboration.
Technical Excellence
We deliver rigorous engineering analysis and design, drawing on deep expertise in ground source systems, thermal modelling, and geotechnical engineering to solve complex challenges.
Knowledge Transfer
We share our expertise through training, workshops, and technical guidance, helping to build capability across the engineering and construction sectors.
Our Team
Expert engineers delivering innovative solutions
Prof Guillermo A. Narsilio
Founder & Lead Engineer
PhD in Geotechnical Engineering
Professor, University of Melbourne
Fellow, Institution of Engineers Australia
Professor Guillermo Narsilio is the founder of Fourth Element Energy and a leading international expert in geothermal engineering. With over 20 years of research and consulting experience, he has pioneered advances in ground source heat pump systems and energy geostructures.
As a Professor at the University of Melbourne, Guillermo combines cutting-edge academic research with practical engineering consultancy. His work has influenced geothermal engineering practice across Australia, Asia, and Europe.
Guillermo leads 4EE's technical direction and is personally involved in all major projects, ensuring the highest standards of engineering excellence are maintained throughout.
Dr Luis Bandeira Neto
Senior Engineer
Dr Luis Bandeira Neto is a specialist in thermal response testing and geothermal system design. His expertise spans the full project lifecycle, from feasibility assessment through to detailed design and commissioning.
Luis brings extensive experience in ground source heat pump installations across a wide range of building types and geological conditions. His rigorous approach to thermal testing ensures optimal system performance.
PhD in Geothermal Engineering
Chartered Professional Engineer
Dr Qusi Alqawasmeh
Senior Engineer
Dr Qusi Alqawasmeh specialises in energy geostructures and sustainable foundation systems. His research and consulting work focuses on integrating thermal exchange capabilities within building foundations and underground infrastructure.
Qusi's expertise enables innovative approaches to geothermal energy extraction that leverage existing structural elements, reducing costs and environmental impact.
PhD in Geotechnical Engineering
Specialist in Energy Piles
Dr Annie Gu
Senior Engineer
Dr Annie Gu is a specialist in ground source heat pump systems and thermal modelling. Her work involves detailed numerical analysis and simulation of geothermal systems to optimise energy performance.
Annie's expertise in computational modelling enables accurate prediction of system behaviour and supports evidence-based design decisions across all 4EE projects.
PhD in Mechanical Engineering
Thermal Modelling Specialist