Company lists · Data refreshed September 2026

Top 23 Marine geotechnical firms based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 442 companies tracked

RevenueBase identified 442 marine geotechnical firms headquartered in Australia as of September 2026 and tracks 8,372 professional contacts across them, including 3,552 with verified work emails. Perth is the largest hub.

This list covers marine geotechnical firms 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 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

442Companies

8,372Contacts tracked

3,552Verified emails

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The 23 largest marine geotechnical firms based in Australia

Ranked by team size

Top 23 of 442 marine geotechnical firms based in Australia, 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	Boskalis Offshore Energy	Indirect evidence	Perth, AustraliaHQ checked Sep 20, 2026	201-500	1,029 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
2	Douglas Partners	Partial evidence	West Ryde, AustraliaHQ checked Sep 20, 2026	501-1,000	466 contacts →
	Partial 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 20, 2026
3	Construction Sciences	Partial evidence	Albion, AustraliaHQ checked Sep 20, 2026	1,001-5,000	423 contacts →
	Partial evidence “Construction Sciences is a construction materials testing, geotechnical engineering, environmental consulting and specialised testing firm.” Source: RevenueBase Database · checked Sep 20, 2026
4	Bhagwan Marine	Partial evidence	Perth, AustraliaHQ checked Sep 20, 2026	501-1,000	376 contacts →
	Partial evidence “Bhagwan Marine is Australia's largest marine solutions provider operating in the offshore energy, subsea, ports & inshore and defence sectors.” Source: RevenueBase Database · checked Sep 20, 2026
5	Australian Offshore Solutions PTY LTD	Partial evidence	Applecross, AustraliaHQ checked Sep 20, 2026	501-1,000	273 contacts →
	Partial evidence “Australian Offshore Solutions Australian Offshore Solutions offers a diverse range of specialised marine services to the offshore oil and gas and construction industries.” Source: RevenueBase Database · checked Sep 20, 2026
6	PSM	Indirect evidence	North Ryde, AustraliaHQ checked Sep 20, 2026	51-200	223 contacts →
	Indirect evidence “PSM provides specialised design and investigation services for engineering in rock, soil and water.” Source: RevenueBase Database · checked Sep 20, 2026
7	Total AMS	Partial evidence	North Fremantle, AustraliaHQ checked Sep 20, 2026	201-500	198 contacts →
	Partial evidence “For more than 25 years, TAMS has partnered with clients through collaborative delivery models, applying specialist expertise to construct and maintain critical marine and port…” Source: RevenueBase Database · checked Sep 20, 2026
8	Geovert	Indirect evidence	Rosebery, AustraliaHQ checked Sep 20, 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 20, 2026
9	Hall Contracting	Partial evidence	Buderim, AustraliaHQ checked Sep 20, 2026	51-200	165 contacts →
	Partial evidence “Hall Contracting is Australia’s largest privately-owned dredging, civil and marine construction company with offices in South East Asia, the Pacific Islands and Australia.” Source: RevenueBase Database · checked Sep 20, 2026
10	Maritime Constructions	Partial evidence	Port Adelaide, AustraliaHQ checked Sep 20, 2026	51-200	124 contacts →
	Partial evidence “Maritime Constructions is a complete provider of specialist marine infrastructure solutions.” Source: RevenueBase Database · checked Sep 20, 2026
11	Alliance Geotechnical	Partial evidence	Seven Hills, AustraliaHQ checked Sep 20, 2026	51-200	120 contacts →
	Partial 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 20, 2026
12	Shelf Subsea	Partial evidence	Osborne Park, AustraliaHQ checked Sep 20, 2026	51-200	119 contacts →
	Partial evidence “SHELF is a totally independent commercial diving, engineering, project management and marine support & logistics company.” Source: RevenueBase Database · checked Sep 20, 2026
13	Pacific Marine Group	Indirect evidence	Townsville, AustraliaHQ checked Sep 20, 2026	51-200	117 contacts →
	Indirect evidence “Who Are We?” Source: RevenueBase Database · checked Sep 20, 2026
14	Macquarie Geotechnical	Partial evidence	Bathurst, AustraliaHQ checked Sep 20, 2026	51-200	108 contacts →
	Partial 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 20, 2026
15	EI Australia	Partial evidence	Pyrmont, AustraliaHQ checked Sep 20, 2026	51-200	93 contacts →
	Partial 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 20, 2026
16	AMOG	Indirect evidence	Glen Waverley, AustraliaHQ checked Sep 20, 2026	51-200	80 contacts →
	Indirect evidence “Expertise.” Source: RevenueBase Database · checked Sep 20, 2026
17	JK Group	Indirect evidence	Macquarie Park, AustraliaHQ checked Sep 20, 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 20, 2026
18	ACE Civil PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 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 20, 2026
19	Chadwick Geotechnics	Partial evidence	Dandenong South, AustraliaHQ checked Sep 20, 2026	51-200	61 contacts →
	Partial 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 20, 2026
20	Ground Science PTY LTD	Partial evidence	Thomastown, AustraliaHQ checked Sep 20, 2026	51-200	60 contacts →
	Partial 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 20, 2026
21	Legion Drilling	Partial evidence	Pinkenba, AustraliaHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “Legion Drilling is a specialist provider of Environmental, Geotechnical and Sonic drilling services.” Source: RevenueBase Database · checked Sep 20, 2026
22	Brady Marine & Civil	Partial evidence	Brisbane, AustraliaHQ checked Sep 20, 2026	51-200	56 contacts →
	Partial evidence “Since 2010, Brady Marine & Civil have proudly delivered design and construction solutions for over water works, from simple marine structures to complex civil infrastructure…” Source: RevenueBase Database · checked Sep 20, 2026
23	STA Consulting Engineers	Indirect evidence	Eight Mile Plains, AustraliaHQ checked Sep 20, 2026	51-200	55 contacts →
	Indirect evidence “STA is one of the most trusted engineering companies in the Australian building industry.” 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 23 of 442 marine geotechnical firms based in Australia

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Marine geotechnical firms based in Australia at a glance

As of Sep 20, 2026

42.4%Verified-email coverage

18.9Average contacts per company

1-10Median size (employees)

7.0%Largest-city concentration · Perth

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

240

11-50

132

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 442 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 Australia 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 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, 3,552 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 Perth31

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 Australia?

RevenueBase identified 442 marine geotechnical firms 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?

Boskalis Offshore Energy, headquartered in Perth, tops this list with the largest team on record.

Which city has the most marine geotechnical firms?

Perth leads with 31 headquartered companies, followed by Sydney (23) and Melbourne (22).

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 3,552 verified decision-maker contacts tracked across these 442 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.