Company lists · Data refreshed September 2026

Top 24 Site investigation companies based in Australia

Name: Site investigation companies based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 314 companies tracked

RevenueBase identified 314 site investigation companies headquartered in Australia as of September 2026 and tracks 4,931 professional contacts across them, including 2,423 with verified work emails. Perth is the largest hub.

This list covers site investigation companies headquartered in Australia, 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

314Companies

4,931Contacts tracked

2,423Verified emails

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The 24 largest site investigation companies based in Australia

Ranked by team size

Top 24 of 314 site investigation companies based in Australia, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to site investigation companies: 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	Douglas Partners	Indirect evidence	West Ryde, AustraliaHQ checked Sep 22, 2026	501-1,000	466 contacts →
	Indirect evidence “Welcome to Douglas Partners Pty Ltd, a leading engineering consultancy specialising in geotechnics, rock mechanics, environment, groundwater, earthworks and geophysics.” Source: RevenueBase Database · checked Sep 22, 2026
2	Construction Sciences	Indirect evidence	Albion, AustraliaHQ checked Sep 22, 2026	1,001-5,000	423 contacts →
	Indirect evidence “Construction Sciences is a construction materials testing, geotechnical engineering, environmental consulting and specialised testing firm.” Source: RevenueBase Database · checked Sep 22, 2026
3	PSM	Partial evidence	North Ryde, AustraliaHQ checked Sep 22, 2026	51-200	223 contacts →
	Partial evidence “PSM provides specialised design and investigation services for engineering in rock, soil and water.” Source: RevenueBase Database · checked Sep 22, 2026
4	Geovert	Indirect evidence	Rosebery, AustraliaHQ checked Sep 22, 2026	201-500	192 contacts →
	Indirect evidence “Geovert is a global ground engineering company founded in Christchurch, New Zealand in 2001.” Source: RevenueBase Database · checked Sep 22, 2026
5	Alliance Geotechnical	Indirect evidence	Seven Hills, AustraliaHQ checked Sep 22, 2026	51-200	120 contacts →
	Indirect evidence “Alliance Geotechnical is an established and highly respected Geotechnical and Environmental consultancy firm with a proven track record in delivering and exceeding our client’s…” Source: RevenueBase Database · checked Sep 22, 2026
6	Macquarie Geotechnical	Indirect evidence	Bathurst, AustraliaHQ checked Sep 22, 2026	51-200	108 contacts →
	Indirect evidence “Macquarie Geotechnical is a leading provider of geotechnical services, supporting the construction, government, mining, renewable energy, groundwater, and environmental sectors.” Source: RevenueBase Database · checked Sep 22, 2026
7	EI Australia	Indirect evidence	Pyrmont, AustraliaHQ checked Sep 22, 2026	51-200	93 contacts →
	Indirect evidence “Welcome to EI Australia an Australian-owned, ISO 9001, 14001 & 4801 Certified, professional services company providing Environmental, Geotechnical and Structural engineering…” Source: RevenueBase Database · checked Sep 22, 2026
8	Durkin	Indirect evidence	Seven Hills, AustraliaHQ checked Sep 22, 2026	51-200	65 contacts →
	Indirect evidence “Durkin provides professional engineering services to the construction and built environment industries within the Australian workspace.” Source: RevenueBase Database · checked Sep 22, 2026
9	JK Group	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 22, 2026	51-200	65 contacts →
	Indirect evidence “The JK Group is a proudly employee owned and managed company that values professionalism through honesty, dependability and integrity.” Source: RevenueBase Database · checked Sep 22, 2026
10	ACE Civil PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 22, 2026	201-500	65 contacts →
	Indirect evidence “ACE Civil (formerly ACE Demolition and Excavation) has been established since 1997, the company is specialized in ground engineering and piling works in addition to demolition and…” Source: RevenueBase Database · checked Sep 22, 2026
11	Chadwick Geotechnics	Indirect evidence	Dandenong South, AustraliaHQ checked Sep 22, 2026	51-200	61 contacts →
	Indirect evidence “Chadwick Geotechnics is a leading provider of geotechnical engineering services across Australia, with over 20 years of experience and a team of highly qualified engineers and…” Source: RevenueBase Database · checked Sep 22, 2026
12	Ground Science PTY LTD	Indirect evidence	Thomastown, AustraliaHQ checked Sep 22, 2026	51-200	60 contacts →
	Indirect evidence “Ground Science was established in 2003 as a multi-disciplinary engineering company, providing the following services throughout Victoria- Geotechnical Engineering with field and…” Source: RevenueBase Database · checked Sep 22, 2026
13	Legion Drilling	Indirect evidence	Pinkenba, AustraliaHQ checked Sep 22, 2026	51-200	58 contacts →
	Indirect evidence “Legion Drilling is a specialist provider of Environmental, Geotechnical and Sonic drilling services.” Source: RevenueBase Database · checked Sep 22, 2026
14	PCA Ground Engineering	Indirect evidence	Arundel, AustraliaHQ checked Sep 22, 2026	51-200	57 contacts →
	Indirect evidence “We deliver ground engineering solutions across industrial, commercial, environmental, mining and infrastructure sectors.” Source: RevenueBase Database · checked Sep 22, 2026
15	Prompt Engineering PTY LTD	Indirect evidence	Wangara, AustraliaHQ checked Sep 22, 2026	11-50	51 contacts →
	Indirect evidence “Prompt Engineering has established a reputation as an industry leader in the field of civil, structural & geotechnical engineering thanks to our commitment to fast, cost-effective…” Source: RevenueBase Database · checked Sep 22, 2026
16	Ground Technologies PTY LTD	Indirect evidence	Prestons, AustraliaHQ checked Sep 22, 2026	11-50	50 contacts →
	Indirect evidence “Strength you can build on.” Source: RevenueBase Database · checked Sep 22, 2026
17	Prime Mining	Indirect evidence	Brisbane, AustraliaHQ checked Sep 22, 2026	51-200	49 contacts →
	Indirect evidence “Prime Mining is a trusted, specialised provider of customer-focused engineering solutions including project and consulting services, and relief labour hire.” Source: RevenueBase Database · checked Sep 22, 2026
18	Butler Partners PTY LTD	Indirect evidence	Albion, AustraliaHQ checked Sep 22, 2026	51-200	42 contacts →
	Indirect evidence “At Butler Partners, we specialise in providing high quality, practical, face-to-face and cost-effective design advice to our clients.” Source: RevenueBase Database · checked Sep 22, 2026
19	Core Consultants	Indirect evidence	Coolum Beach, AustraliaHQ checked Sep 22, 2026	11-50	42 contacts →
	Indirect evidence “Geotechnical Engineering and Environmental Science” Source: RevenueBase Database · checked Sep 22, 2026
20	WW Surveys	Indirect evidence	East Brisbane, AustraliaHQ checked Sep 22, 2026	11-50	41 contacts →
	Indirect evidence “WW Surveys specialises in providing survey services to major infrastructure and mining projects across Queensland and Northern New South Wales.” Source: RevenueBase Database · checked Sep 22, 2026
21	WML Consultants PTY LTD	Indirect evidence	Bunbury, AustraliaHQ checked Sep 22, 2026	51-200	40 contacts →
	Indirect evidence “For more than 28 years, WML Consultants have engineered solutions for clients within and beyond Western Australia.” Source: RevenueBase Database · checked Sep 22, 2026
22	Civil Geotechnical Consultants	Indirect evidence	Taringa, AustraliaHQ checked Sep 22, 2026	11-50	40 contacts →
	Indirect evidence “CGC provide specialist geotechnical engineering services for transport and civil infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
23	Vassallo Constructions	Indirect evidence	Mount Pleasant, AustraliaHQ checked Sep 22, 2026	51-200	38 contacts →
	Indirect evidence “Vassallo Constructions is a Mackay based company with expertise in Earthworks, Roadworks, Concrete works, Pipelaying, Landscaping, Surveying, Environmental Remediation…” Source: RevenueBase Database · checked Sep 22, 2026
24	Geotechnical Engineering	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 22, 2026	51-200	35 contacts →
	Indirect evidence “ACCIONA Australia is a group unlike any other in Australian infrastructure and construction.” 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: site investigation companies. 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 site investigation companies.
Partial evidence: Its own public description names part of site investigation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name site investigation companies. 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 24 of 314 site investigation companies based in Australia

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Site investigation companies based in Australia at a glance

As of Sep 22, 2026

49.1%Verified-email coverage

15.7Average contacts per company

1-10Median size (employees)

7.6%Largest-city concentration · Perth

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

171

11-50

101

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, 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 site investigation companies, 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 Australia whose own description of what they do matches “site investigation companies”. 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 site investigation companies), 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 site investigation companies, and records with no verified work email. Companies headquartered outside Australia 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, 2,423 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 site investigation companies, 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 site investigation companies are there based in Australia?

RevenueBase identified 314 site investigation companies headquartered in Australia 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?

Douglas Partners, headquartered in West Ryde, tops this list with the largest team on record.

Which city has the most site investigation companies?

Perth leads with 24 headquartered companies, followed by Melbourne (18) and Sydney (15).

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 2,423 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 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.