Company lists · Data refreshed September 2026

Top 25 Geological consultants based in New Zealand

Name: Geological consultants 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 314 companies tracked

RevenueBase identified 314 geological consultants headquartered in New Zealand as of September 2026 and tracks 6,116 professional contacts across them, including 3,575 with verified work emails. Auckland is the largest hub.

This list covers geological consultants 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

314Companies

6,116Contacts tracked

3,575Verified emails

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The 25 largest geological consultants based in New Zealand

Ranked by team size

Top 25 of 314 geological consultants 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 geological consultants: 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	Tonkin Taylor	Indirect evidence	Auckland Central, New ZealandHQ checked Sep 21, 2026	1,001-5,000	958 contacts →
	Indirect evidence “At Tonkin + Taylor, we’re dedicated to creating and sustaining a better world together.” Source: RevenueBase Database · checked Sep 21, 2026
2	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
3	Opus International Consultants Limited	Indirect evidence	Wellington, New ZealandHQ checked Sep 21, 2026	1,001-5,000	568 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
4	Babbage Consultants Limited	Partial evidence	Auckland, New ZealandHQ checked Sep 21, 2026	201-500	233 contacts →
	Partial evidence “Babbage is a 100% New Zealand-owned multi-discipline consultancy offering 'one-stop-shop' solutions and specialist expertise in Architecture and Interior Design, Ecology…” Source: RevenueBase Database · checked Sep 21, 2026
5	Kirk Roberts Consulting	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	129 contacts →
	Indirect evidence “Our purpose and passion is striving continuously to find better ways.” Source: RevenueBase Database · checked Sep 21, 2026
6	Engeo NZ & AU	Strong evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	121 contacts →
	Strong 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
7	BCD Group Limited	Partial evidence	Hamilton, New ZealandHQ checked Sep 21, 2026	51-200	116 contacts →
	Partial evidence “BCD Group Limited is a locally owned and operated consultancy specialising in Planning, Surveying, Environmental, Geotechnical, Civil, Traffic & Transport, Structural and Fire…” Source: RevenueBase Database · checked Sep 21, 2026
8	Ergo Consulting	Partial evidence	Auckland, New ZealandHQ checked Sep 21, 2026	51-200	112 contacts →
	Partial evidence “Ergo aspires to be New Zealand’s first choice provider of engineering consultancy services to the power and energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
9	BTW Company LTD	Indirect evidence	New Plymouth, New ZealandHQ checked Sep 21, 2026	51-200	97 contacts →
	Indirect evidence “With offices in Ngāmotu – New Plymouth, Kirikiriroa – Hamilton, Whāingaroa – Raglan and Taupō, BTW is made up of 90+ professional land and geospatial surveyors, civil and…” Source: RevenueBase Database · checked Sep 21, 2026
10	Riley Consultants	Partial evidence	Takapuna, New ZealandHQ checked Sep 21, 2026	51-200	84 contacts →
	Partial evidence “Our company has evolved from humble yet visionary origins to become the multi-disciplinary consultancy it is today.” Source: RevenueBase Database · checked Sep 21, 2026
11	LDE Engineers Scientists	Indirect evidence	Gisborne, New ZealandHQ checked Sep 21, 2026	51-200	81 contacts →
	Indirect evidence “LDE are specialists in geotechnical, civil, environmental and structural engineering.” Source: RevenueBase Database · checked Sep 21, 2026
12	Fraser Thomas LTD	Indirect evidence	Auckland, New ZealandHQ checked Sep 21, 2026	51-200	77 contacts →
	Indirect evidence “Fraser Thomas is a Multi-Disciplinary, client focused consulting firm specialising in resource management, engineering and surveying.” Source: RevenueBase Database · checked Sep 21, 2026
13	Cheal Consultants LTD	Partial evidence	Taupo, New ZealandHQ checked Sep 21, 2026	51-200	72 contacts →
	Partial evidence “Cheal is an award-winning multi-disciplinary consultancy with offices in Taupo, Taumarunui, Ohakune, Rotorua, Napier and Hamilton.” Source: RevenueBase Database · checked Sep 21, 2026
14	INOVO	Partial evidence	Christchurch Central, New ZealandHQ checked Sep 21, 2026	51-200	71 contacts →
	Partial evidence “Inovo is a dynamic and genuine consultancy partner, specialising in project planning, project management and land development.” Source: RevenueBase Database · checked Sep 21, 2026
15	TM Consultants	Indirect evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	69 contacts →
	Indirect evidence “New Zealand’s multi-award winning, sustainable-passionate professional consulting engineering partners.” Source: RevenueBase Database · checked Sep 21, 2026
16	Davis Ogilvie	Partial evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	69 contacts →
	Partial evidence “Davis Ogilvie (DO) is a trusted multidisciplinary engineering consultancy in the South Island with an unwavering commitment to the region, its communities and the environment.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cato Bolam	Partial evidence	Auckland, New ZealandHQ checked Sep 21, 2026	51-200	55 contacts →
	Partial evidence “Cato Bolam is a multidisciplinary consultancy delivering integrated, concept-to-completion solutions across land development, housing, infrastructure, civil engineering…” Source: RevenueBase Database · checked Sep 21, 2026
18	Mitchell Daysh	Partial evidence	Dunedin, New ZealandHQ checked Sep 21, 2026	11-50	45 contacts →
	Partial evidence “Mitchell Daysh is a specialist environmental and planning consultancy with the right people to navigate New Zealand's most complex resource management challenges to our government…” Source: RevenueBase Database · checked Sep 21, 2026
19	RDCL	Indirect evidence	Hastings, New ZealandHQ checked Sep 21, 2026	11-50	44 contacts →
	Indirect evidence “RDCL is a world class team of geotechnical and geophysical specialists providing innovative and expert solutions.” Source: RevenueBase Database · checked Sep 21, 2026
20	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
21	Cook Costello	Partial evidence	Whangarei, New ZealandHQ checked Sep 21, 2026	11-50	40 contacts →
	Partial evidence “Cook Costello is a New Zealand multidisciplinary engineering consultancy working across geotechnical, civil and structural engineering, geophysics, land surveying, land…” Source: RevenueBase Database · checked Sep 21, 2026
22	Damwatch Engineering LTD	Partial evidence	Wellington, New ZealandHQ checked Sep 21, 2026	11-50	40 contacts →
	Partial 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
23	Geosolve LTD	Partial evidence	South Dunedin, New ZealandHQ checked Sep 21, 2026	11-50	39 contacts →
	Partial 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
24	Engco Consulting Engineers	Partial evidence	Christchurch, New ZealandHQ checked Sep 21, 2026	51-200	39 contacts →
	Partial evidence “ENGCO is a multi-disciplinary national consultancy with expertise delivering large scale projects, worth in excess of $100 million, and at the boutique end of the market…” Source: RevenueBase Database · checked Sep 21, 2026
25	EDC	Partial evidence	Auckland, New ZealandHQ checked Sep 21, 2026	11-50	39 contacts →
	Partial evidence “Who We Are With offices in Auckland, Christchurch and Whakatane, multi-disciplined Engineering Design Consultants (EDC) are your answer to all things engineering.// What We Do EDC…” 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: geological consultants. 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 geological consultants.
Partial evidence: Its own public description names part of geological consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geological consultants. 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 314 geological consultants based in New Zealand

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Geological consultants based in New Zealand at a glance

As of Sep 21, 2026

58.5%Verified-email coverage

19.5Average contacts per company

1-10Median size (employees)

29.9%Largest-city concentration · Auckland

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

179

11-50

103

51-200

201-500

501-1,000

1,001-5,000

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 314 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 geological consultants, 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 “geological consultants”. 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 geological consultants), 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 geological consultants, 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, 3,575 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.

Geological consultants by metro

Geological consultants in Auckland94
Geological consultants in Christchurch51

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 geological consultants, 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 geological consultants are there based in New Zealand?

RevenueBase identified 314 geological consultants 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?

Tonkin Taylor, headquartered in Auckland, tops this list with the largest team on record.

Which city has the most geological consultants?

Auckland leads with 94 headquartered companies, followed by Christchurch (51) and Wellington (19).

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 3,575 verified decision-maker contacts tracked across these 314 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.