Company lists · Data refreshed September 2026

Top 25 Marine geotechnical firms based in New Zealand

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 111 companies tracked

RevenueBase identified 111 marine geotechnical firms headquartered in New Zealand as of September 2026 and tracks 1,141 professional contacts across them, including 588 with verified work emails. Auckland is the largest hub.

This list covers marine geotechnical 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 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 20, 2026 86% judged on-target in blind review

111Companies

1,141Contacts tracked

588Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest marine geotechnical firms based in New Zealand

Ranked by team size

Top 25 of 111 marine geotechnical firms based in New Zealand, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine geotechnical firms: 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 20, 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 20, 2026
2	LDE Engineers Scientists	Partial evidence	Gisborne, New ZealandHQ checked Sep 20, 2026	51-200	81 contacts →
	Partial evidence “LDE are specialists in geotechnical, civil, environmental and structural engineering.” Source: RevenueBase Database · checked Sep 20, 2026
3	Heron Construction Company LTD	Partial evidence	Papakura, New ZealandHQ checked Sep 20, 2026	51-200	52 contacts →
	Partial evidence “Heron Construction is a family owned and operated marine construction company that specialises in using backhoe dredgers for marine dredging.” Source: RevenueBase Database · checked Sep 20, 2026
4	Cook Costello	Partial evidence	Whangarei, New ZealandHQ checked Sep 20, 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 20, 2026
5	Geosolve LTD	Indirect evidence	South Dunedin, New ZealandHQ checked Sep 20, 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 20, 2026
6	March Construction LTD	Partial evidence	Christchurch, New ZealandHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial 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 20, 2026
7	Initia	Partial evidence	Auckland, New ZealandHQ checked Sep 20, 2026	11-50	33 contacts →
	Partial evidence “Initia is a specialist geotechnical engineering consultancy that provides design, advisory and construction observation services for building, infrastructure and earthworks…” Source: RevenueBase Database · checked Sep 20, 2026
8	Abseil Access LTD	Indirect evidence	Wellington, New ZealandHQ checked Sep 20, 2026	51-200	32 contacts →
	Indirect evidence “Abseil Access aims to assist in the improvement of New Zealand's infrastructure and give the public access to some of the most remarkable landscapes possible via our bespoke…” Source: RevenueBase Database · checked Sep 20, 2026
9	HD GEO	Partial evidence	Hamilton, New ZealandHQ checked Sep 20, 2026	11-50	31 contacts →
	Partial evidence “We are specialists in geotechnical engineering and land and water contamination.” Source: RevenueBase Database · checked Sep 20, 2026
10	Soil & Rock Consultants	Partial evidence	Henderson, New ZealandHQ checked Sep 20, 2026	51-200	28 contacts →
	Partial 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 20, 2026
11	NAL Civil & Structural Engineers Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “About Us: NAL Civil & Structural Engineers Limited is a multi-disciplinary engineering consultancy specialising in a broad range of civil infrastructure and building projects.” Source: RevenueBase Database · checked Sep 20, 2026
12	Rock Control	Indirect evidence	Christchurch, New ZealandHQ checked Sep 20, 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 20, 2026
13	Marine Industrial Design LTD	Partial evidence	Auckland, New ZealandHQ checked Sep 20, 2026	11-50	24 contacts →
	Partial evidence “New Zealand's leading Naval Architecture and Marine engineering design consultancy company with a proven track record of practical engineering and design solutions.” Source: RevenueBase Database · checked Sep 20, 2026
14	Aimecs Engineering	Indirect evidence	Avondale, New ZealandHQ checked Sep 20, 2026	11-50	23 contacts →
	Indirect evidence “Aimecs Engineering is an ISO9001, ISO14001 & ISO45001 accredited engineering company based in Auckland and Albany.” Source: RevenueBase Database · checked Sep 20, 2026
15	Wilton Joubert - Geotech	Partial evidence	Auckland, New ZealandHQ checked Sep 20, 2026	51-200	23 contacts →
	Partial 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 20, 2026
16	EGL Engineering Geology Limited	Partial evidence	Auckland, New ZealandHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “Engineering Geology Ltd (EGL) is a professional consultancy practice specialising in geotechnical and earthquake engineering and engineering geology.” Source: RevenueBase Database · checked Sep 20, 2026
17	Webster Drilling And Exploration Limited	Indirect evidence	Porirua, New ZealandHQ checked Sep 20, 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 20, 2026
18	Discovery Marine Limited	Indirect evidence	Tauranga, New ZealandHQ checked Sep 20, 2026	1-10	18 contacts →
	Indirect evidence “OUR SERVICES - Measurement Science, BATHYMETRIC & TOPOGRAPHIC Surveys We measure and model anything below, above or near the waterline in any format our clients require.” Source: RevenueBase Database · checked Sep 20, 2026
19	KGA Geotechnical Group Limited	Partial evidence	Auckland & Christchurch, New ZealandHQ checked Sep 20, 2026	11-50	17 contacts →
	Partial evidence “Geotechnical Engineers of Choice!” Source: RevenueBase Database · checked Sep 20, 2026
20	Andy O'sullivan	Partial evidence	Auckland Central, New ZealandHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial 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 20, 2026
21	BSK Consulting Engineers	Indirect evidence	Rotorua, New ZealandHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “BSK Consulting Engineers are a fun team of committed and experienced engineers based in Rotorua and Tauranga.” Source: RevenueBase Database · checked Sep 20, 2026
22	Dtce Consulting Engineers	Partial evidence	Wellington, New ZealandHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “Welcome to DTCE Consulting Engineers, Wellington’s structural and geotechnical specialists.” Source: RevenueBase Database · checked Sep 20, 2026
23	Mcmillan Drilling	Indirect evidence	Auckland & Christchurch, New ZealandHQ checked Sep 20, 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 20, 2026
24	Landtech Consulting	Partial evidence	Christchurch, New ZealandHQ checked Sep 20, 2026	11-50	13 contacts →
	Partial 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 20, 2026
25	Torlesse LTD	Partial evidence	Wellington, New ZealandHQ checked Sep 20, 2026	11-50	13 contacts →
	Partial evidence “Torlesse Ltd is a professional services firm specialising in geotechnical and civil engineering solutions.” Source: RevenueBase Database · checked Sep 20, 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: marine geotechnical firms. 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 marine geotechnical firms.
Partial evidence: Its own public description names part of marine geotechnical firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine geotechnical firms. 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 111 marine geotechnical firms based in New Zealand

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 588 reachable decision-makers.

Free signup · no credit card

View the full list →

Marine geotechnical firms based in New Zealand at a glance

As of Sep 20, 2026

51.5%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

27.0%Largest-city concentration · Auckland

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 111 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 marine geotechnical firms, 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 “marine geotechnical firms”. 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 marine geotechnical firms), 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 marine geotechnical 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 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, 588 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 20, 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.

Marine geotechnical firms by metro

Marine geotechnical firms in Auckland30

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 marine geotechnical firms, 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 marine geotechnical firms are there based in New Zealand?

RevenueBase identified 111 marine geotechnical 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?

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

Which city has the most marine geotechnical firms?

Auckland leads with 30 headquartered companies, followed by Christchurch (15) and Hamilton (6).

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 588 verified decision-maker contacts tracked across these 111 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 111 marine geotechnical firms based in New Zealand. Start with a free account, no credit card.

Download this list →

Related lists

Marine geotechnical firms by geography

Browse the directory

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.