Company lists · Data refreshed September 2026

Top 25 Subsurface exploration services based in New Zealand

Name: Subsurface exploration services based in New Zealand
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 38 companies tracked

RevenueBase identified 38 subsurface exploration services headquartered in New Zealand as of September 2026 and tracks 1,073 professional contacts across them, including 603 with verified work emails. Christchurch is the largest hub.

This list covers subsurface exploration 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 22, 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 22, 2026 86% judged on-target in blind review

38Companies

1,073Contacts tracked

603Verified emails

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The 25 largest subsurface exploration services based in New Zealand

Ranked by team size

Top 25 of 38 subsurface exploration services based in New Zealand, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to subsurface exploration 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	Seequent	Partial evidence	Christchurch, New ZealandHQ checked Sep 22, 2026	501-1,000	696 contacts →
	Partial 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 22, 2026
2	Geosolve LTD	Indirect evidence	South Dunedin, New ZealandHQ checked Sep 22, 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 22, 2026
3	Alton Drilling Limited	Indirect evidence	Waihi, New ZealandHQ checked Sep 22, 2026	51-200	34 contacts →
	Indirect evidence “A privately owned company, Alton Drilling provides quality professional service with a friendly business approach.” Source: RevenueBase Database · checked Sep 22, 2026
4	Soil & Rock Consultants	Indirect evidence	Henderson, New ZealandHQ checked Sep 22, 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 22, 2026
5	Rock Control	Indirect evidence	Christchurch, New ZealandHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “Rock Control are ground engineering specialists with a firm focus on construction drilling.” Source: RevenueBase Database · checked Sep 22, 2026
6	Face Mining Services	Indirect evidence	Tauranga, New ZealandHQ checked Sep 22, 2026	51-200	24 contacts →
	Indirect evidence “Face Mining Services Pty Ltd is your trusted partner in underground mining, bringing leading expertise to any corner of the globe with the highest standard of service, from…” Source: RevenueBase Database · checked Sep 22, 2026
7	Wilton Joubert - Geotech	Indirect evidence	Auckland, New ZealandHQ checked Sep 22, 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 22, 2026
8	EGL Engineering Geology Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 22, 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 22, 2026
9	Webster Drilling And Exploration Limited	Partial evidence	Porirua, New ZealandHQ checked Sep 22, 2026	11-50	20 contacts →
	Partial evidence “Webster Drilling and Exploration Limited is a drilling contracting company based out of Porirua, Wellington, New Zealand.” Source: RevenueBase Database · checked Sep 22, 2026
10	KGA Geotechnical Group Limited	Indirect evidence	Auckland & Christchurch, New ZealandHQ checked Sep 22, 2026	11-50	17 contacts →
	Indirect evidence “Geotechnical Engineers of Choice!” Source: RevenueBase Database · checked Sep 22, 2026
11	Mcmillan Drilling	Indirect evidence	Auckland & Christchurch, New ZealandHQ checked Sep 22, 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 22, 2026
12	Torlesse LTD	Indirect evidence	Wellington, New ZealandHQ checked Sep 22, 2026	11-50	13 contacts →
	Indirect evidence “Torlesse Ltd is a professional services firm specialising in geotechnical and civil engineering solutions.” Source: RevenueBase Database · checked Sep 22, 2026
13	Southern Geophysical	Partial evidence	Bromley, New ZealandHQ checked Sep 22, 2026	11-50	9 contacts →
	Partial evidence “Southern Geophysical Ltd is a leading provider of geophysical solutions for the environmental, engineering and exploration communities.” Source: RevenueBase Database · checked Sep 22, 2026
14	Civil Services	Indirect evidence	Onekawa, New ZealandHQ checked Sep 22, 2026	11-50	9 contacts →
	Indirect evidence “Civil Services HB Ltd specialises in civil and geotechnical engineering design, surveying (topographical, construction setout), quality assurance compaction testing and…” Source: RevenueBase Database · checked Sep 22, 2026
15	Pro-Drill	Indirect evidence	Pukekohe, New ZealandHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence “We are New Zealand’s most innovative Geotechnical Drilling Company.” Source: RevenueBase Database · checked Sep 22, 2026
16	Landform Projects LTD	Indirect evidence	Lincoln, New ZealandHQ checked Sep 22, 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 22, 2026
17	Interdrill LTD	Indirect evidence	Stratford, New ZealandHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence “Since 1990 Interdrill has been providing outstanding drilling services to clients in Wellington, Wanganui and the Taranaki.” Source: RevenueBase Database · checked Sep 22, 2026
18	GEO Data Solutions GDS	Indirect evidence	North Island Wide, New ZealandHQ checked Sep 22, 2026	1-10	5 contacts →
	Indirect evidence “Geo Data Solutions (GDS) is a data acquisition and testing company lead by an experienced and knowledgeable team.” Source: RevenueBase Database · checked Sep 22, 2026
19	Geosolutions NZ LTD	Indirect evidence	Mapua, New ZealandHQ checked Sep 22, 2026	1-10	5 contacts →
	Indirect evidence “Geotechnical consultancy services, specialising in engineering geology.” Source: RevenueBase Database · checked Sep 22, 2026
20	Barham United Welldrillers 2021 LTD	Indirect evidence	Hamilton, New ZealandHQ checked Sep 22, 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 22, 2026
21	Gaia Engineers	Indirect evidence	Auckland, New ZealandHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
22	Petralogic	Partial evidence	Christchurch, New ZealandHQ checked Sep 22, 2026	1-10	2 contacts →
	Partial evidence “We undertake subsurface investigations, analysis and reporting to support resource consent (subdivision) and building consent applications and for use in detailed design.” Source: RevenueBase Database · checked Sep 22, 2026
23	Lander Geotechnical Consultants Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 22, 2026	11-50	2 contacts →
	Indirect evidence “Lander Geotechnical Consultants were established in 2014 by Principal Geotechnical Engineer, Shane Lander, who heads a professional team geotechnical engineers and geologists.” Source: RevenueBase Database · checked Sep 22, 2026
24	Drillcore LTD	Indirect evidence	Hamurana, New ZealandHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence “We offer specialist geotechnical testing including but not limited to: Core Penetration Testing HQ, PQ Coring Push tubes SPT Testing Wash Drilling Geothermal Test Pits Packer…” Source: RevenueBase Database · checked Sep 22, 2026
25	Terrane Consultants LTD	Indirect evidence	Tauranga, New ZealandHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 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: subsurface exploration 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 subsurface exploration services.
Partial evidence: Its own public description names part of subsurface exploration services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsurface exploration 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 38 subsurface exploration services based in New Zealand

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Subsurface exploration services based in New Zealand at a glance

As of Sep 22, 2026

56.2%Verified-email coverage

28.2Average contacts per company

11-50Median size (employees)

15.8%Largest-city concentration · Christchurch

Sep 22, 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 38 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 subsurface exploration 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 “subsurface exploration 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 subsurface exploration 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 subsurface exploration 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, 603 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 22, 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 subsurface exploration 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 subsurface exploration services are there based in New Zealand?

RevenueBase identified 38 subsurface exploration 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?

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

Which city has the most subsurface exploration services?

Christchurch leads with 6 headquartered companies, followed by Auckland (5) and Wellington (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 603 verified decision-maker contacts tracked across these 38 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 22, 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.