Company lists · Data refreshed September 2026

Top 25 Hydrogeology companies based in New Zealand

Name: Hydrogeology companies based in New Zealand
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 78 companies tracked

RevenueBase identified 78 hydrogeology companies headquartered in New Zealand as of September 2026 and tracks 1,604 professional contacts across them, including 916 with verified work emails. Auckland is the largest hub.

This list covers hydrogeology companies 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

78Companies

1,604Contacts tracked

916Verified emails

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The 25 largest hydrogeology companies based in New Zealand

Ranked by team size

Top 25 of 78 hydrogeology companies based in New Zealand, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogeology companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Seequent	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	501-1,000	696 contacts →
	Indirect evidence “Seequent, The Bentley Subsurface Company, helps organisations to understand the underground, giving them the confidence to make better decisions faster.” Source: RevenueBase Database · checked Sep 21, 2026
2	Engeo NZ & AU	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	121 contacts →
	Indirect evidence “ENGEO Ltd (formally Geoscience Consulting) is a specialist consultancy group providing Engineering Geological, Geophysical, Environmental and Geotechnical Engineering services.” Source: RevenueBase Database · checked Sep 21, 2026
3	MTL NZ	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	51-200	65 contacts →
	Indirect evidence “Founded in 1994, MTL specialises in engineering design and project management for renewable energy, water infrastructure and industrial projects.” Source: RevenueBase Database · checked Sep 21, 2026
4	GWE Consulting Engineers	Indirect evidence	Takapuna, New ZealandHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “GWE Consulting Engineers is a multi-disciplinary engineering consultancy providing geotechnical, civil and water, environmental, wastewater and stormwater engineering services and…” Source: RevenueBase Database · checked Sep 21, 2026
5	Damwatch Engineering LTD	Indirect evidence	Wellington, New ZealandHQ checked Sep 21, 2026	11-50	40 contacts →
	Indirect evidence “Damwatch is a highly respected niche consultancy business based in Wellington, New Zealand and provide services to hydropower, water and irrigation clients internationally.” Source: RevenueBase Database · checked Sep 21, 2026
6	Geosolve LTD	Indirect evidence	South Dunedin, New ZealandHQ checked Sep 21, 2026	11-50	39 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
7	March Construction LTD	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	39 contacts →
	Indirect evidence “March Construction brings together the geotechnical and water infrastructure expertise, which when combined with the micro-tunnelling expertise of our sister company Rob Carr…” Source: RevenueBase Database · checked Sep 21, 2026
8	Verum Group	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	11-50	32 contacts →
	Indirect evidence “Verum Group is an environmental research and consulting company, with specialist knowledge in Environmental and Occupational Hygiene monitoring, energy technologies and…” Source: RevenueBase Database · checked Sep 21, 2026
9	Soil & Rock Consultants	Indirect evidence	Henderson, New ZealandHQ checked Sep 21, 2026	51-200	28 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
10	JRG Energy	Indirect evidence	Taupo, New ZealandHQ checked Sep 21, 2026	11-50	27 contacts →
	Indirect evidence “JRG Energy is an established group of personalized consultants servicing all aspects of the Oil and Gas, Geothermal, and Renewable Energy Industries.” Source: RevenueBase Database · checked Sep 21, 2026
11	Watersmart	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Trusted, Innovative, Water Solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Wilton Joubert - Geotech	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	51-200	23 contacts →
	Indirect evidence “Geotechnical Engineering, and Engineering Geology, including Site Investigations, Earthworks Supervision and Control, Expansive Soils, Dynamic Probing, Foundation & Retaining Wall…” Source: RevenueBase Database · checked Sep 21, 2026
13	Geo40 Limited	Indirect evidence	Taupo, New ZealandHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “Geo40 is an innovative technology development and operating company based in New Zealand.” Source: RevenueBase Database · checked Sep 21, 2026
14	EGL Engineering Geology Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “Engineering Geology Ltd (EGL) is a professional consultancy practice specialising in geotechnical and earthquake engineering and engineering geology.” Source: RevenueBase Database · checked Sep 21, 2026
15	Webster Drilling And Exploration Limited	Indirect evidence	Porirua, New ZealandHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “Webster Drilling and Exploration Limited is a drilling contracting company based out of Porirua, Wellington, New Zealand.” Source: RevenueBase Database · checked Sep 21, 2026
16	KGA Geotechnical Group Limited	Indirect evidence	Auckland & Christchurch, New ZealandHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Geotechnical Engineers of Choice!” Source: RevenueBase Database · checked Sep 21, 2026
17	Andy O'sullivan	Indirect evidence	Auckland Central, New ZealandHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Andy O’Sullivan was established to offer a nimble international best practice service in geotechnical design to the local infrastructure industry.” Source: RevenueBase Database · checked Sep 21, 2026
18	Williamson Water & Land Advisory	Indirect evidence	Kumeu, New ZealandHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Williamson Water & Land Advisory (WWLA) is a New Zealand based, employee owned, niche environmental consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
19	Mcmillan Drilling	Indirect evidence	Auckland & Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	15 contacts →
	Indirect evidence “McMillan Drilling is a leading multi-disciplinary drilling company operating throughout New Zealand and the Pacific.” Source: RevenueBase Database · checked Sep 21, 2026
20	Drilling Fluid Equipment DFE	Indirect evidence	Bell Block, New ZealandHQ checked Sep 21, 2026	1-10	15 contacts →
	Indirect evidence “Drilling Fluid Equipment (DFE) is a results driven company specialising in providing customised solutions to meet our clients unique set of requirements.” Source: RevenueBase Database · checked Sep 21, 2026
21	Landtech Consulting	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “LandTech Consulting is a specialist geotechnical service provider comprising a team of qualified Geotechnical Engineers and Engineering Geologists, with experience in geotechnical…” Source: RevenueBase Database · checked Sep 21, 2026
22	HAL Consulting LTD	Indirect evidence	Parnell, New ZealandHQ checked Sep 21, 2026	11-50	12 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
23	Land River SEA Consulting	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	1-10	10 contacts →
	Indirect evidence “Specialist engineering consulting firm with expertise in hydraulic modelling of rivers and streams, river engineering, geomorphology, hydrology and hydrologic modelling, remote…” Source: RevenueBase Database · checked Sep 21, 2026
24	Trenchmate	Indirect evidence	Papakura, New ZealandHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “Trenchmate is a New Zealand-owned company dedicated to delivering certified shoring, groundwater treatment, and solids control solutions.” Source: RevenueBase Database · checked Sep 21, 2026
25	Earthtech Consulting Limited	Indirect evidence	Pukekohe, New ZealandHQ checked Sep 21, 2026	1-10	9 contacts →
	Indirect evidence “Welcome to Earthtech Consulting Limited.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: hydrogeology companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names hydrogeology companies.
Partial evidence: Its own public description names part of hydrogeology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeology companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 78 hydrogeology companies based in New Zealand

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Hydrogeology companies based in New Zealand at a glance

As of Sep 21, 2026

57.1%Verified-email coverage

20.6Average contacts per company

11-50Median size (employees)

21.8%Largest-city concentration · Auckland

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured worldwide rather than for New Zealand, so it is reported there. Company counts and contact totals on this page are exact for New Zealand, over 78 companies.

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 hydrogeology companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, 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 “hydrogeology companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names hydrogeology companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among hydrogeology companies, 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 its RevenueBase Smart Search 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, 916 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 21, 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

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names hydrogeology companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many hydrogeology companies are there based in New Zealand?

RevenueBase identified 78 hydrogeology companies 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?

Seequent, headquartered in Christchurch, tops this list with the largest team on record.

Which city has the most hydrogeology companies?

Auckland leads with 17 headquartered companies, followed by Christchurch (15) 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 916 verified decision-maker contacts tracked across these 78 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 21, 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 Smart Search, 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.