Our Team

At Valenza Engineering, people come first. Our team includes experienced hydrogeologists, groundwater modellers, water and hydraulic engineers. As the company grows, we are committed to attracting, developing and retaining the right people who are highly competent, live the company’s values and actively contribute to our long-term success.

Valenza Engineering personnel are members of internationally recognised professional organisations, e.g. IAH, International Association of Hydrogeologist. Principal personnel have between 20 and 30 years experience and are Chartered Professionals from Engineers Australia and Overseas Engineering bodies.

Alexis Valenza Managing Director, Principal Groundwater Engineer

Alexis Valenza has a Master of Hydrogeology and Engineering Geology from the University of Montpellier, France. He has worked since 1995 with international mining and hydrogeological consulting firms on large environmental, geotechnical and infrastructure projects – including tunneling and underground dewatering – in Europe, Africa, Middle East and South-East Asia. With a broad base of expertise, Alexis thrives on the challenges that come with untangling complex problems. He is dedicated to delivering innovative problem solving and high level technical precision to clients who appreciate his holistic approach to water management. In 2011, Alexis launched Valenza Engineering, a Melbourne-based consultancy providing tech­nical and advisory services to the mining, construction, water resource and contaminated land industries, in groundwater and related environmental science.


Dr Sanjeeva Manamperi Senior Hydrogeologist

Sanjeeva has a PhD in Environmental Earth Science from Latrobe University, Melbourne. He has worked since 1997 with water research organizations, international hydrogeological consulting firms on large mining, environmental and water management projects, government and non-governmental organisations on regional environmental assessments and numerical groundwater modelling projects in Australasia region. As a highly motivated professional with analytical, planning and implementation aptitude, Sanjeeva uses his knowledge and experience to solve complex problems and derive durable and positive solutions to those problems in the fields of hydrogeology, geology, environmental geochemistry, water quality and geophysics (in particular, electrical resistivity).

Paul Larkin Principal Hydrogeologist

Paul has over 35 years’ experience in ground water and environmental issues. From 1979 to 2003, he was founder and CEO of Aqua Tech/Environmental Consultants, a leading natural resources and environmental consulting group in Botswana. Experienced in ground water, water master planning, environmental impact assessment, spatial planning, natural resources management, environmental law and policy consulting, Paul has worked in Australia, Africa, the Middle East, the Pacific, South America and Europe. He currently consults with clients from a range of industries, including the industrial minerals and mining sectors, on ground water and environmental issues in Australia.

Joshua O'Connor Graduate Environmental Engineer

As an environmental engineer and junior hydrogeologist, Joshua is experienced in managing and reporting on groundwater investigations in the mining and contaminated land sectors. Joshua has a Bachelor of Engineering (Environmental Engineering) (Honours) and is a member of the International Association of Hydrogeologists (IAH) and Engineers Australia. Joshua’s professional experience was gained from undertaking, organising and reporting on groundwater investigations across the water resource, mining and contaminated land sectors. Joshua is confident in GIS, data analysis; as well as water well drilling, geological logging, pump testing, groundwater quality sampling and instrumentation.

Dr Mohammad N Cheema Principal Hydrologist, Hydraulic Engineer

Dr Cheema has more than 35 years’ experience in hydraulics, hydrology, drainage, river engineering and water sensitive urban design, having worked on a variety of water resource and infrastructure projects in Australia, the United States and many developing countries. His expertise includes hydraulics, hydrology and water resources, as well as environmental aspects of development, river engineering and drainage engineering.

Dr Kevin Hayley Senior Groundwater Modeller

Kevin Hayley is a Geophysicist/Hydrogeologist with 14 years of experience in using geophysical methods for environmental monitoring and mineral exploration, and in the construction and calibration of numerical models of groundwater flow and contaminant transport.

He received his PhD from the University of Calgary in 2010 where he conducted research into monitoring salt impacted soil using time lapse geophysics. He has strengths in numerical methods, inverse problems and uncertainty analysis.

Recent project experience over the past 5 years has involved developing methods and software for highly parallelized groundwater model calibration and predictive uncertainty quantification using cloud computing.

Dr Anastasia Boronia (Perth Office) Principal Hydrogeologist and Groundwater Modeller

Anastasia is a hydrogeologist with over 20 years of experience within research and consultancy. Anastasia conducted her PhD and post-doctorate research in hydrogeology of semi-arid areas in Cyprus and Africa and was awarded a PhD degree from ETH Zurich, Switzerland.

After moving to UK in 2006 and then in Australia in 2008, Anastasia worked as a groundwater consultant on a wide range of water supply, mining and construction projects in Australia, Africa, Russia, Kazakhstan and Mongolia.

Anastasia has an expertise in groundwater flow and transport modelling using all commercially available computer codes. She developed numerous regional groundwater models for water supply, dewatering and environmental assessment purposes and she was leading groundwater modelling projects in several consulting teams in Western Australia. Additionally to consultancy work, Anastasia is currently lecturing and supervising research students in University of Western Australia on the subjects of Hydrogeology and Mining Hydrogeology.

Peter Gribbin (New Zealand Office) Senior Principal Hydrogeologist

Peter has more than 30 years’ experience as a Chartered Geologist, and an Engineering and Environmental Consultant within the mining, civil engineering and environmental sectors. From the mining industry to environmental regulation, Peter has developed vast expertise in the fields of mineral exploration, mining engineering, geotechnics and hydrogeology, wor-king and supporting projects in Africa, Asia, Australia, NZ and the UK. For the past 12 years, Peter has consulted on mining, major infrastructure, land development and water resource projects in the UK and Australasia-Pacific region. His diversity of experience enables him to apply many strands of geoscience in an integrated manner – presenting whole solutions and remaining a specialist across key areas.

Dr Attila Kovacs (Hungary Office) Senior Groundwater Modeller

Dr Kovacs is a specialist in groundwater modelling and an internationally regarded and widely published expert in the field of karst and fractured rock hydrogeology. Awarded a PhD from the Hydrogeology Centre, University of Neuchatel, Switzerland, Dr Kovacs has worked at the Water Resources Research Institute of Hungary and the Geothermal Institute of Auckland University, New Zealand. As a technical expert and senior project manager globally since 2005, he brings experience in water resources protection, nuclear waste disposal, contaminated site assessment and remediation, mining, Coal Seam Gas, geothermal and geotechnical projects. Dr Kovacs is adept in applying large variety of modelling software, including Feflow, Visual Modflow, Groundwater Vistas, GMS, TOUGH2 and compflow for modelling porous, fractured and karstic groundwater and multiphase systems.

Dr Jean-Philippe Bellot (France Office) Senior Geologist and Hydrogeologist

Dr Bellot is specialised in the field of porous aquifer, fractured rock hydrogeology and sur­face water-aquifer exchanges. Jean Philippe holds a Master in Geology form the University of Grenoble and was awarded a PhD in Mineral Geology from the University of Montpellier, France. As a technical expert and project manager, he brings a wealth of experience in the water resource sector. His experience covers large scale pumping test, water treatment and supply management techniques aligned with European best practice. Dr Bellot has been involved in numerous large scale urban and rural supply projects, groundwater sustainability and protection using spatial analysis techniques.

Dr Bellot has started his carrier with the BRGM (French geological survey), and has been in consulting since, with consulting firms specialising in water management for local authorities (HGM) and in innovative metrology applied to water resources (imaGeau).

Kiril Pezhgorski (Qatar Office) Senior Water Engineer

Kiril has substantial knowledge and experience in the fields of water resource management, capital investment planning and operational efficiency of water distribution systems. With 15 years’ experience, working across four continents, Kiril’s expertise includes integrated master planning, hydraulic modelling, design of water and waste water infrastructure and facilities, non-revenue water analysis and management, financial analysis and investment planning, as well as asset management and optimisation. Based in Qatar for the past six years, Kiril has supported strategic projects with leading government agencies: City of Doha (sustainable irrigation strategy); Aspire Foundation (assessing alternative ground water resources, opera­tional and asset management strategy; Public Works Authority (undertaking geotechnical site investigation).

Hassan Mounzer Geotechnical Engineer, Global BDM

Hassan has an international career spreading between the Middle-East, Europe and Australia. He has years of experience in the oil & gas offshore geotechnical engineering, consulting for national and international companies such as Chevron, Woodside, Petrofac and Saudi Aramco. His business acumen from his MBA study year at the university of Western Australia and his experience in business development and project leader for the multi-national company ATCO Gas is very significant. Hassan is a driven leader and great communicator with a focus on clients’ satisfaction and job acquisition. He holds a master in geo-mechanical engineering from Grenoble (France) and he is a multi-lingual professional (English, French, and Arabic).