Company lists · Data refreshed September 2026

Top 25 Hydrogeology consulting services based in New Zealand

Name: Hydrogeology consulting services 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 56 companies tracked

RevenueBase identified 56 hydrogeology consulting services headquartered in New Zealand as of September 2026 and tracks 571 professional contacts across them, including 337 with verified work emails. Auckland is the largest hub.

This list covers hydrogeology consulting services 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

56Companies

571Contacts tracked

337Verified emails

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The 25 largest hydrogeology consulting services based in New Zealand

Ranked by team size

Top 25 of 56 hydrogeology consulting services 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 consulting services: 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	Engeo NZ & AU	Partial evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	121 contacts →
	Partial 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
2	GWE Consulting Engineers	Partial evidence	Takapuna, New ZealandHQ checked Sep 21, 2026	11-50	43 contacts →
	Partial 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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	BSK Consulting Engineers	Partial evidence	Rotorua, New ZealandHQ checked Sep 21, 2026	11-50	16 contacts →
	Partial evidence “BSK Consulting Engineers are a fun team of committed and experienced engineers based in Rotorua and Tauranga.” Source: RevenueBase Database · checked Sep 21, 2026
11	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
12	Geoconsult NEW Zealand	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “Geoconsult is a privately owned New Zealand engineering consultancy, specialising in the fields of geotechnical engineering and engineering geology.” Source: RevenueBase Database · checked Sep 21, 2026
13	Land River SEA Consulting	Partial evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial 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
14	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
15	CLC Consulting Group Limited	Partial evidence	Auckland, New ZealandHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “We offer Consulting Services in the following fields: Civil & Environmental Engineering, Structural Engineering, Land Surveying and Resource Management Planning.” Source: RevenueBase Database · checked Sep 21, 2026
16	Earthtech Consulting Limited	Partial evidence	Pukekohe, New ZealandHQ checked Sep 21, 2026	1-10	9 contacts →
	Partial evidence “Welcome to Earthtech Consulting Limited.” Source: RevenueBase Database · checked Sep 21, 2026
17	Deane Consultancy LTD	Partial evidence	Auckland & Northland, New ZealandHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “We are a consulting engineering firm that offers a comprehensive range of geotechnical, civil & structural engineering services throughout Auckland and Northland.” Source: RevenueBase Database · checked Sep 21, 2026
18	Blueline Consulting NZ	Indirect evidence	Taupo, New ZealandHQ checked Sep 21, 2026	11-50	7 contacts →
	Indirect evidence “We are a forward-thinking consultancy driven by our passion for pioneering design concepts and advancing sustainable solutions.” Source: RevenueBase Database · checked Sep 21, 2026
19	RDA Consulting	Indirect evidence	Invercargill, New ZealandHQ checked Sep 21, 2026	11-50	7 contacts →
	Indirect evidence “We are a multi-disciplinary team providing holistic, leading edge environmental, civil and geotechnical solutions to improve the interaction of enterprise with soils, air, water…” Source: RevenueBase Database · checked Sep 21, 2026
20	Landform Projects LTD	Indirect evidence	Lincoln, New ZealandHQ checked Sep 21, 2026	1-10	7 contacts →
	Indirect evidence “Landform Projects Ltd is locally owned, with a team bringing over 50 years of combined experience in site investigation, geotechnical testing, and land design projects across…” Source: RevenueBase Database · checked Sep 21, 2026
21	Submergent Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “Submergent Limited provides computer modelling services to the New Zealand water engineering industry.” Source: RevenueBase Database · checked Sep 21, 2026
22	Geosolutions NZ LTD	Indirect evidence	Mapua, New ZealandHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “Geotechnical consultancy services, specialising in engineering geology.” Source: RevenueBase Database · checked Sep 21, 2026
23	Barham United Welldrillers 2021 LTD	Indirect evidence	Hamilton, New ZealandHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “Our experienced team of drillers offer professional Water well drilling, geotechnical and environmental drilling services.” Source: RevenueBase Database · checked Sep 21, 2026
24	Honnor Drilling Limited	Indirect evidence	Hastings, New ZealandHQ checked Sep 21, 2026	11-50	4 contacts →
	Indirect evidence “Honnor Drilling has over 50 years of experience drilling high volume water wells, geothermal precollars, well maintenance and compliance.” Source: RevenueBase Database · checked Sep 21, 2026
25	Mappazzo	Partial evidence	Nelson, New ZealandHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial evidence “Mappazzo provides efficient, customer tailored consulting, GIS and design services to complement environmental and engineering services.” 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 consulting services. 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 consulting services.
Partial evidence: Its own public description names part of hydrogeology consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeology consulting services. 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 56 hydrogeology consulting services based in New Zealand

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Hydrogeology consulting services based in New Zealand at a glance

As of Sep 21, 2026

59.0%Verified-email coverage

10.2Average contacts per company

1-10Median size (employees)

28.6%Largest-city concentration · Auckland

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 56 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 consulting services, 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 consulting services”. 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 consulting services), 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 consulting services, 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, 337 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 consulting services, 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 consulting services are there based in New Zealand?

RevenueBase identified 56 hydrogeology consulting services 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?

Engeo NZ & AU, headquartered in Christchurch, tops this list with the largest team on record.

Which city has the most hydrogeology consulting services?

Auckland leads with 16 headquartered companies, followed by Christchurch (9) and Hamilton (2).

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 337 verified decision-maker contacts tracked across these 56 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.