Company lists · Data refreshed September 2026

Top 25 Hydrogeological consulting firms based in New Zealand

Name: Hydrogeological consulting firms based in New Zealand
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 76 companies tracked

RevenueBase identified 76 hydrogeological consulting firms headquartered in New Zealand as of September 2026 and tracks 864 professional contacts across them, including 508 with verified work emails and 20 with mobile numbers. Auckland is the largest hub.

This list covers hydrogeological consulting firms headquartered in New Zealand, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

76Companies

864Contacts tracked

508Verified emails

20Mobile numbers

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The 25 largest hydrogeological consulting firms based in New Zealand

Ranked by team size

Top 25 of 76 hydrogeological consulting firms based in New Zealand, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydrogeological consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Riley ConsultantsIndirect evidence	Takapuna, New ZealandHQ checked Sep 3, 2026	51-200	86
	“Our company has evolved from humble yet visionary origins to become the multi-disciplinary consultancy it is today.” Source: company website · checked Sep 3, 2026
2	LDE Engineers ScientistsIndirect evidence	Gisborne, New ZealandHQ checked Sep 3, 2026	51-200	82
	“LDE are specialists in geotechnical, civil, environmental and structural engineering.” Source: company website · checked Sep 3, 2026
3	Fraser Thomas LTDPartial evidence	Auckland, New ZealandHQ checked Sep 3, 2026	51-200	76
	“Fraser Thomas is a Multi-Disciplinary, client focused consulting firm specialising in resource management, engineering and surveying.” Source: company website · checked Sep 3, 2026
4	GWE Consulting EngineersPartial evidence	Takapuna, New ZealandHQ checked Sep 3, 2026	11-50	42
	“GWE Consulting Engineers is a multi-disciplinary engineering consultancy providing geotechnical, civil and water, environmental, wastewater and stormwater engineering services and…” Source: company website · checked Sep 3, 2026
5	Geosolve LTDIndirect evidence	South Dunedin, New ZealandHQ checked Sep 3, 2026	11-50	40
	“At GeoSolve we understand the importance of managing geological risk, and our specialist knowledge and proven track record means we can provide practical resilient solutions…” Source: company website · checked Sep 3, 2026
6	Damwatch Engineering LTDIndirect evidence	New ZealandHQ checked Sep 3, 2026	11-50	40
	“Damwatch is a highly respected niche consultancy business based in Wellington, New Zealand and provide services to hydropower, water and irrigation clients internationally.” Source: company website · checked Sep 3, 2026
7	AWA EnvironmentalIndirect evidence	Wellington, New ZealandHQ checked Sep 3, 2026	11-50	37
	“Awa Environmental is shaping stormwater to reduce flood risk, protect critical assets and infrastructure, and build resilient communities and thriving ecosystems.” Source: company website · checked Sep 3, 2026
8	Verum GroupPartial evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	32
	“Verum Group is an environmental research and consulting company, with specialist knowledge in Environmental and Occupational Hygiene monitoring, energy technologies and…” Source: company website · checked Sep 3, 2026
9	Aqualinc Research LimitedPartial evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	29
	“Aqualinc Research Limited is an independent provider of research-based consulting services for water and land management.” Source: company website · checked Sep 3, 2026
10	Soil & Rock ConsultantsIndirect evidence	Henderson, New ZealandHQ checked Sep 3, 2026	51-200	27
	“With a rich legacy spanning over three decades, Soil & Rock Consultants stand at the forefront of the geotechnical, environmental, civil, and geological engineering landscape in…” Source: company website · checked Sep 3, 2026
11	WatersmartIndirect evidence	Auckland, New ZealandHQ checked Sep 3, 2026	11-50	26
	“Trusted, Innovative, Water Solutions.” Source: company website · checked Sep 3, 2026
12	EGL Engineering Geology LimitedIndirect evidence	Auckland, New ZealandHQ checked Sep 3, 2026	11-50	20
	“Engineering Geology Ltd (EGL) is a professional consultancy practice specialising in geotechnical and earthquake engineering and engineering geology.” Source: company website · checked Sep 3, 2026
13	Dtce Consulting EngineersPartial evidence	Wellington, New ZealandHQ checked Sep 3, 2026	11-50	16
	“Welcome to DTCE Consulting Engineers, Wellington’s structural and geotechnical specialists.” Source: company website · checked Sep 3, 2026
14	Williamson Water & Land AdvisoryIndirect evidence	Kumeu, New ZealandHQ checked Sep 3, 2026	11-50	16
	“Williamson Water & Land Advisory (WWLA) is a New Zealand based, employee owned, niche environmental consultancy.” Source: company website · checked Sep 3, 2026
15	IrriconIndirect evidence	Timaru South, New ZealandHQ checked Sep 3, 2026	11-50	15
	“Irricon Resource Solutions is a leading environmental consultancy based throughout Canterbury, Otago and the North Island.” Source: company website · checked Sep 3, 2026
16	Geologix Consulting Engineers LTDIndirect evidence	Silverdale, New ZealandHQ checked Sep 3, 2026	11-50	14
	“Geologix is a professional geotechnical, environmental and civil engineering company striving to make a difference through sustainable, honest and flexible engineering solutions.” Source: company website · checked Sep 3, 2026
17	Landtech ConsultingPartial evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	12
	“LandTech Consulting is a specialist geotechnical service provider comprising a team of qualified Geotechnical Engineers and Engineering Geologists, with experience in geotechnical…” Source: company website · checked Sep 3, 2026
18	HAL Consulting LTDPartial evidence	Parnell, New ZealandHQ checked Sep 3, 2026	11-50	12
	“HAL Consulting Ltd (HAL) is a niche engineering consultancy that specialises in wastewater, stormwater and water supply network modelling and strategic planning, and data…” Source: company website · checked Sep 3, 2026
19	E2environmental LTDIndirect evidence	Christchurch, New ZealandHQ checked Sep 3, 2026	11-50	10
	“e2Environmental is a highly experienced, full service civil engineering consultancy specialising in water engineering and land development.” Source: company website · checked Sep 3, 2026
20	RS ENG LTDPartial evidence	Whangarei, New ZealandHQ checked Sep 3, 2026	11-50	10
	“RS Eng is specialised in providing Geotechnical, Civil, Structural & Seismic engineering consulting services.” Source: company website · checked Sep 3, 2026
21	TrenchmateIndirect evidence	Papakura, New ZealandHQ checked Sep 3, 2026	11-50	10
	“Trenchmate is a New Zealand-owned company dedicated to delivering certified shoring, groundwater treatment, and solids control solutions.” Source: company website · checked Sep 3, 2026
22	Traverse Environmental LimitedIndirect evidence	Taupo, New ZealandHQ checked Sep 3, 2026	11-50	9
	“Traverse Environmental is a professional services consultancy specialising in planning, freshwater science and project management.” Source: company website · checked Sep 3, 2026
23	Earthtech Consulting LimitedPartial evidence	Pukekohe, New ZealandHQ checked Sep 3, 2026	1-10	9
	“Earthtech Consulting Limited is a specialist geotechnical consulting practice working in the fields of geotechnical engineering, engineering geology and hydrogeology.” Source: company website · checked Sep 3, 2026
24	Blueline Consulting NZIndirect evidence	Taupo, New ZealandHQ checked Sep 3, 2026	11-50	8
	“We are a forward-thinking consultancy driven by our passion for pioneering design concepts and advancing sustainable solutions.” Source: company website · checked Sep 3, 2026
25	Geopro LimitedIndirect evidence	New ZealandHQ checked Sep 3, 2026	11-50	8
	“Geopro Limited is multi-disciplinary geology and geotechnical engineering consultancy established in Auckland, New Zealand.” Source: company website · checked Sep 3, 2026

Showing 25 of 76 hydrogeological consulting firms based in New Zealand

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Hydrogeological consulting firms based in New Zealand at a glance

As of Sep 3, 2026

1-10Median size (employees)

AucklandLargest hub · 21 HQs

20Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

Verified emails by last verification

0–30

31–60

61–90

299

90–180

169

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among hydrogeological consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in New Zealand whose own description of what they do matches “hydrogeological consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among hydrogeological consulting firms, and records with no verified work email. Companies headquartered outside New Zealand are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 508 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

How many hydrogeological consulting firms are there based in New Zealand?

RevenueBase identified 76 hydrogeological consulting firms headquartered in New Zealand as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Riley Consultants, headquartered in Auckland, tops this list with the largest team on record.

Which city has the most hydrogeological consulting firms?

Auckland leads with 21 headquartered companies, followed by Christchurch (11) and Hamilton (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 508 verified decision-maker contacts tracked across these 76 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.