We're engineers, project managers and scientists

Marine | Moana

We create innovative solutions that help transform communities

From the mountains to the sea  | Ki uta ki tai

Dare to be different with us

Coastal | Matāwhanga


Operating in Aotearoa since 2017, Wallbridge Gilbert Aztec (WGA) brings local expertise backed by an international reputation built over 40 years.

We understand the Aotearoa / New Zealand market, and our clients are serviced from our Tāmaki Makaurau (Auckland), Kirikiriroa (Hamilton) and Ōtautahi (Christchurch) offices, supported by the scale and certainty of WGA’s Australian operations which guarantees the same quality performance each and every time.



Across the country, our team of water scientists are renowned for delivering Managed Aquifer Recharge, integrated water management, hydrology, hydrogeology, water quality, geochemistry and groundwater.

Our local capability in Ports and Marine and Wastewater is expanding to offer holistic civil engineering services across the whole water cycle.

We don’t believe that one size fits all. Instead, we take time to tailor our services to our market with a client focus approach and a commitment to safety and quality, meaning your projects are in safe hands no matter the complexity.

Our People


Regional Manager  / Principal Hydrogeologist HMTN

BSc (Earth Science); MSc (Technology) (Hons)
Clare, a Senior Hydrogeologist with over 20 years of experience, focuses on sustainable management of groundwater resources and surface water systems. She gained broad experience in multiple hydrogeological disciplines during her 9-year stint as a Groundwater Scientist in two Regional Councils. Clare is also an expert witness in consent hearings and environment court cases. She has led groundwater modelling projects and recommended resource allocation policies. With a keen interest in managed aquifer recharge, Clare excels in numerical modelling for resource management and mining purposes. She effectively communicates technical recommendations and groundwater policies to the general public and technical groups. Clare values building strong client relationships and seeks innovative solutions for their needs.


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Senior Hydrogeologist HMTN

BSc (Hons) (Geology); MSci Tech (Hydrogeology)
Catherine, a Hydrogeologist with a Master’s in Groundwater Studies, has over ten years of experience in the UK, Australia, and New Zealand. She has expertise in hydrogeological investigations gained in regulatory bodies and consultancy firms. Catherine excels in pump test analysis, regional water assessments, water quality monitoring, and project management. She is highly skilled at managing diverse projects and recognised for her strong communication and relationship-building abilities with teams.


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Senior Principal Hydrogeologist AKL

BSc (Geology); MSc (Geology); Post Grad Cert Applied Env. Geology
Brett is a seasoned Principal Hydrogeologist with 25+ years of experience in hydrogeology, water management, and water quality assessment. His expertise includes groundwater resource evaluation, utilisation, management, and protection, focusing on mining and extractive industries. He has led or contributed to numerous groundwater flow and contaminant transport modelling projects, covering areas such as mine dewatering, waste storage, and managed aquifer recharge. Brett has presented evidence at resource consent hearings and in the Environment Court and is a reviewer for the Auckland Council and the Environmental Protection Authority.


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Senior Principal Stormwater Engineer AKL

B. Eng. (Civil and Water) First Class Hons); M. Eng. (Water Resources;Fellow of Engineers Australia, Certified Practicing Eng
Joe, a Senior Principal Stormwater Engineer, specialises in sustainable surface water management and ecosystem integration. With over 35 years of experience, he has been recognised with State Awards for Excellence for his innovative projects in erosion control, waterway rehabilitation, wetlands, and source control. Joe’s expertise extends to water-sensitive urban design, applied globally, including the Sponge Cities Program in China. As a Fellow of Engineers Australia and Chair of the Civil Engineering Advisory Committee at the University of South Australia, he actively contributes to advancing the field. Joe’s practical and cost-effective approach achieves multiple objectives, ensuring environmental and economic success.


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Senior Hydrogeologist CHCH

BSc (Geology Earth Science); MSc (Hydrology Water Resources Science)
Cameron is a distinguished Senior Hydrogeologist with 10 years’ experience within the realm of water supply projects and hydrogeological investigations. His comprehensive knowledge and proficiency extend across an array of capabilities, specialising in the evaluation of both surface water and groundwater systems. Cameron has successfully navigated diverse domains such as community water supply, agricultural monitoring, wetland management, managed aquifer recharge, stormwater systems, hydropower support, dewatering, wastewater discharge, and contaminated sites. His proficiency extends to aquifer testing, analytical hydrogeology, and groundwater modelling, underpinned by a strong foundation in field methods and conceptual modelling. Cameron’s skill set is amplified by his adept use of tools like geographic information systems, remote sensing, and geophysics.


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Hydrogeologist AKL

BSc (Geology and Env. Sci); Master Water Resource Management (Distinction)
William, a Hydrologist with a Master’s in water resource management, has three years of experience in groundwater research. His expertise lies in hydrological investigations, including regional-scale groundwater/surface assessments, water quality monitoring and modelling, groundwater/surface water interaction, MAR operations, and analytical data interpretation. He possesses strong communication skills and has established robust relationships with community and professional stakeholders.

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Graduate Hydrogeologist CHCH

Bsc (Geography and Env. Sci); Master Water Resource Management (Distinction)

James joined WGA after completing his Master’s thesis on groundwater-surface water interactions at the University of Canterbury. For his research, he analysed the meteoric, surface, and groundwaters of the Ōtūkaikino River. James is enthusiastic about stream restoration and has experience in pumping test analysis and effects assessments for groundwater resource consent applications. He worked as a summer intern with the Environment Canterbury groundwater team, gaining practical fieldwork experience.


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Our Capabilities

We thrive by delivering complex projects and creating exceptional client outcomes.

Harnessing our collective skills and expertise, we dare to be different, providing sound, safe and world-leading scientific and engineering solutions to address the big challenges facing our clients, communities, and the world.

Armed with local knowledge and a passion for the natural environment, our team bring an acute understanding of freshwater management, coastal infrastructure engineering and design to suit New Zealand’s unique landscape and coastlines.

  • Our expertise in groundwater covers an extensive range of specialties, from numerical modelling of aquifers to testing individual wells for consent applications. Our team has experience helping to develop groundwater resource protection policies and rules and working on behalf of clients in hearings and, if needed, in environment court.

    We are recognised throughout New Zealand as one of the top hydrogeology teams known for leading some of the most innovative and ‘first of their kind’ projects. Our focus remains centred on helping our government, private, and industry clients manage their groundwater supplies for the increasing pressures posed by our changing climate.


  • Freshwater is a taonga and is at the core of the cultural identity of the tangata whenua.  The availability of high-quality fresh water is fundamental to the protection and restoration of our threatened aquatic ecosystems. Intrinsic to our landscapes, our freshwater environments support our way of life and the health and well-being of our people and communities.

    With over 100 years of combined experience, we think differently to offer innovative ways to understand New Zealand’s natural water bodies better.  From conducting stream surveys to developing collaborative monitoring programs, we merge western science principles into cultural health monitoring values.

    We have a strong record of working with community stakeholders and iwi to understand better how water moves through the landscape and ensure we manage these precious resources to achieve the desired economic, cultural, and environmental values and outcomesch

  • Ki uta ki tai (from the mountains to the sea) recognises the movement of water through the landscape, from rainfall that generates run-off and groundwater seepage, which supports our nation’s rivers, lakes, wetlands and estuaries.

    Managing large-scale water issues requires a systems-thinking, catchment-scale approach. 

    Derived from global exposure, our team has experience assessing and understanding groundwater and surface water interactions as they relate to resource management and protection. We develop programmes by building advanced numerical modelling tools that drive new policies, rules and strategies for New Zealand’s water management community.

    Integrating the interactions of surface and groundwater resources is regarded as the future of water management globally. We support clients in developing management plans, monitoring networks and leading applied scientific investigations.

    Responding to an emerging environment, we review and manage groundwater monitoring networks to ensure the best use of available resources. And, through a collaborative approach, our highly experienced team provide clients and the community with the best possible tools to develop sustainable management strategies for catchments across New Zealand.

  • Over the past 30 years, WGA’s water team have consented and worked at installing over 75 Groundwater Replenishment Schemes (utilising MAR) across Australasia, North America, and the Middle East.

    In New Zealand alone, our team have led the designs, consenting and technical analysis of more than 18 sites across Canterbury as part of New Zealand’s first community groundwater management programme.

    We are pleased with our achievements, having led the development of New Zealand’s first Aquifer Storage Transfer and Recovery (ASTR) Bore in Gisborne focused on restoring a coastal aquifer showing pressures from decades of overall abstraction.

    Both North and South Islands, we are leaders in the numerical modelling of MAR projects internationally. And across the waters, our Australasian team are global leaders in the technical development of MAR systems, including hydrogeology, geochemistry, engineering, community engagement, and consultation.

    Invested in making our world a better place, we have strong and enduring partnerships with other key New Zealand experts in the areas of planning, freshwater ecology and wetland designs. Together, we work to add value and help design world-leading projects focused on replenishing groundwater supplies to address the impacts of climate change.

  • On land or sea, our maritime and coastal engineers understand the design considerations unique to the marine environment, including materials durability, wave loads, ship berthing forces and tidal movements, all carried out on or over water. We provide maritime engineering expertise including port planning, feasibility studies, inspections, engineering design, project management and construction supervision.

  • Across the Resources Sector, we bring knowledge of site water management and geotechnical engineering, including tunnels and foundation dewatering, in site permitting and consenting.

    Working with our clients, we can support all facets of resource water management, including hydrology, hydraulics, hydrogeology, mine water quality and treatment assessment.

  • Across Australasia and New Zealand, we have access to an experienced group of engineers, scientists, drafters and technical specialists who work across various sectors.

    Our civil water team is highly regarded in the master planning and delivery of major development projects, including major ‘waterproofing’ MAR projects, Water Sensitive Urban Design (WSUD), constructed wetlands sites and stormwater management systems. In addition, we bring experience in wastewater system design and a background in helping develop potable water supplies.

    Our engineers and scientists are industry leaders when it comes to the designs for Aquifer Storage and Recover (ASR) bore headworks, including the pumps and piping systems. Our ability to deliver innovative, buildable and economical solutions for civil projects is further strengthened by our in-house geotechnical expertise.

Featured Projects

Working country-wide across remote towns and dense cities, our team’s knowledge of the natural environment is second to none. Bringing international expertise to the local market, we don’t just deliver, we engage, collaborate and create bespoke solutions that exceed the expectations of our clients and communities, locally.


Hinds/Hekeao Groundwater Replenishment Programme

Waitaha (Canterbury)

Applying the Tools of Managed Aquifer Recharge

WGA led the development of New Zealand’s first regional rules around Managed Aquifer Recharge (MAR) focused on improving groundwater storage (quantity) and quality for various economic, cultural and environmental outcomes.

WGA’s innovative leadership in Mid-canterbury started in 2011 with the Hekaeo/Hinds river recharge trial testing project.

Since WGA spearheaded the development of Canterbury’s first successful 18 MAR sites leading to the development of MAR as a tool in the Hekeao/Hinds catchment. The Hinds/Hekeao MAR trial project and subsequent formation of the Hinds/Hekeao Water Enhancement Trust (HHWET) represents a project of national significance for New Zealand.

A community-driven catchment-scale approach to improving groundwater storage and influencing groundwater quality conditions while seeking to enhance and protect environmental and cultural values and outcomes is considered a game changer in water management. It is imperative as water quantity and quality are issues of major public concern and national point of debate. Implementing these rules, supported by MAR experts, is crucial to the success of this program and positive community and environmental outcomes.

Water Permits for Kiwifruit Orchards

Waikato and Bay of Plenty

Water Permits

WGA collaborates closely with kiwifruit growers in the picturesque Waikato and Bay of Plenty regions of New Zealand, offering valuable assistance in resource consent planning. The region’s favourable soil and climate has sparked a surge in the establishment of new kiwifruit orchards and additional water requirements for established orchards. To enhance optimal growing conditions, growers frequently seek groundwater for irrigation during dry spells. However, securing resource consent is a prerequisite for tapping into local aquifers. 

Our dedicated team is pivotal in supporting growers in harnessing groundwater for irrigation and frost protection in their kiwifruit orchards. Our technical assessments evaluate the potential environmental effects thoroughly. Before applying to take water, all applicants are required to construct bores and perform pumping tests. WGA meticulously analyses the aquifer test data, determining local aquifer hydraulic parameters and bore capacity, considering groundwater level responses in the designated production bore and observation bores. 

These efforts culminate in comprehensive technical reports by WGA, offering a thorough evaluation of the impact on both the groundwater resource and connected surface water bodies. Our reports are then submitted to the respective regional councils, forming an integral part of the resource consent application process. Orchards supported by WGA experience the successful culmination of this process, having secured regional council approval to extract groundwater from their bores and proceed with developmental endeavours.

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A great company starts with #Greatpeople that’s why we offer a rewarding place to develop your career, whether you’re starting out or an experienced professional.

Supported by a team of 500+ across  Australia and New Zealand we provide a rich, diverse and empowered workplace, with the chance to gain invaluable experience from some of the best in the business.

Interested? Reach out to us or visit our career page! 

Interested in working at WGA?

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