Company lists · Data refreshed September 2026

Top 25 Liquefaction assessment firms based in New Zealand

Name: Liquefaction assessment 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 50 companies tracked

RevenueBase identified 50 liquefaction assessment firms headquartered in New Zealand as of September 2026 and tracks 669 professional contacts across them, including 420 with verified work emails. Auckland is the largest hub.

This list covers liquefaction assessment 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

50Companies

669Contacts tracked

420Verified emails

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The 25 largest liquefaction assessment firms based in New Zealand

Ranked by team size

Top 25 of 50 liquefaction assessment 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 liquefaction assessment 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	Geotechnics LTD	Indirect evidence	Onehunga, New ZealandHQ checked Sep 20, 2026	51-200	129 contacts →
	Indirect evidence “Geotechnics is a civil engineering testing company, offering a diversified suite of testing services and testing products.” Source: RevenueBase Database · checked Sep 20, 2026
2	LDE Engineers Scientists	Indirect evidence	Gisborne, New ZealandHQ checked Sep 20, 2026	51-200	81 contacts →
	Indirect evidence “LDE are specialists in geotechnical, civil, environmental and structural engineering.” Source: RevenueBase Database · checked Sep 20, 2026
3	Cook Costello	Indirect evidence	Whangarei, New ZealandHQ checked Sep 20, 2026	11-50	40 contacts →
	Indirect 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
4	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
5	Initia	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 2026	11-50	33 contacts →
	Indirect 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
6	HD GEO	Indirect evidence	Hamilton, New ZealandHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “We are specialists in geotechnical engineering and land and water contamination.” Source: RevenueBase Database · checked Sep 20, 2026
7	Plaxis Geotechnical Analysis	Indirect evidence	Christchurch, New ZealandHQ checked Sep 20, 2026	501-1,000	29 contacts →
	Indirect evidence “Understand the underground and solve complex geotechnical challenges with Seequent's PLAXIS technology.” Source: RevenueBase Database · checked Sep 20, 2026
8	Soil & Rock Consultants	Indirect evidence	Henderson, New ZealandHQ checked Sep 20, 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 20, 2026
9	Wilton Joubert - Geotech	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 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 20, 2026
10	EGL Engineering Geology Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 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 20, 2026
11	KGA Geotechnical Group Limited	Indirect evidence	Auckland & Christchurch, New ZealandHQ checked Sep 20, 2026	11-50	17 contacts →
	Indirect evidence “Geotechnical Engineers of Choice!” Source: RevenueBase Database · checked Sep 20, 2026
12	Andy O'sullivan	Indirect evidence	Auckland Central, New ZealandHQ checked Sep 20, 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 20, 2026
13	Dtce Consulting Engineers	Indirect evidence	Wellington, New ZealandHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Welcome to DTCE Consulting Engineers, Wellington’s structural and geotechnical specialists.” Source: RevenueBase Database · checked Sep 20, 2026
14	Landtech Consulting	Indirect evidence	Christchurch, New ZealandHQ checked Sep 20, 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 20, 2026
15	Torlesse LTD	Indirect evidence	Wellington, New ZealandHQ checked Sep 20, 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 20, 2026
16	Ground Investigation LTD	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “IN SITU TESTING: CPT - Seismic - DMT With a national presence Ground Investigation Ltd is a leading provider of in situ testing to the New Zealand geotechnical industry.” Source: RevenueBase Database · checked Sep 20, 2026
17	Civil Services	Indirect evidence	Onekawa, New ZealandHQ checked Sep 20, 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 20, 2026
18	Deane Consultancy LTD	Indirect evidence	Auckland & Northland, New ZealandHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect 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 20, 2026
19	Landform Projects LTD	Indirect evidence	Lincoln, New ZealandHQ checked Sep 20, 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 20, 2026
20	GEO Data Solutions GDS	Indirect evidence	North Island Wide, New ZealandHQ checked Sep 20, 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 20, 2026
21	Geosolutions NZ LTD	Indirect evidence	Mapua, New ZealandHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Geotechnical consultancy services, specialising in engineering geology.” Source: RevenueBase Database · checked Sep 20, 2026
22	Ground Consulting LTD	Indirect evidence	Pukekohe, New ZealandHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “GCL is an engineering consultancy serving the residential, commercial and land development sectors in the Auckland, Waikato and Queenstown regions.” Source: RevenueBase Database · checked Sep 20, 2026
23	Baseline Geotechnical Limited	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 2026	1-10	3 contacts →
	Indirect evidence “Baseline Geotechnical was founded in July 2018 by Principal Engineering Geologist Cameron Lines.” Source: RevenueBase Database · checked Sep 20, 2026
24	Gaia Engineers	Indirect evidence	Auckland, New ZealandHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
25	Petralogic	Indirect evidence	Christchurch, New ZealandHQ checked Sep 20, 2026	1-10	2 contacts →
	Indirect 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 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: liquefaction assessment 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 liquefaction assessment firms.
Partial evidence: Its own public description names part of liquefaction assessment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name liquefaction assessment 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 50 liquefaction assessment firms based in New Zealand

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Liquefaction assessment firms based in New Zealand at a glance

As of Sep 20, 2026

62.8%Verified-email coverage

13.4Average contacts per company

1-10Median size (employees)

34.0%Largest-city concentration · Auckland

Sep 20, 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 50 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 liquefaction assessment 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 “liquefaction assessment 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 liquefaction assessment 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 liquefaction assessment 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, 420 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.

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 liquefaction assessment 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 liquefaction assessment firms are there based in New Zealand?

RevenueBase identified 50 liquefaction assessment 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?

Geotechnics LTD, headquartered in Auckland, tops this list with the largest team on record.

Which city has the most liquefaction assessment firms?

Auckland leads with 17 headquartered companies, followed by Christchurch (8) and Wellington (3).

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 420 verified decision-maker contacts tracked across these 50 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.

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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.