Company lists · Data refreshed September 2026

Top 23 Hydrogeological consulting firms based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 600 companies tracked

RevenueBase identified 600 hydrogeological consulting firms headquartered in Australia as of September 2026 and tracks 12,222 professional contacts across them, including 5,612 with verified work emails and 699 with mobile numbers. Perth is the largest hub.

This list covers hydrogeological consulting 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

600Companies

12,222Contacts tracked

5,612Verified emails

699Mobile numbers

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The 23 largest hydrogeological consulting firms based in Australia

Ranked by team size

Top 23 of 600 hydrogeological consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydrogeological consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Douglas PartnersIndirect evidence	West Ryde, AustraliaHQ checked Sep 3, 2026	501-1,000	465
	“Welcome to Douglas Partners Pty Ltd, a leading engineering consultancy specialising in geotechnics, rock mechanics, environment, groundwater, earthworks and geophysics.” Source: company website · checked Sep 3, 2026
2	Construction SciencesPartial evidence	Albion, AustraliaHQ checked Sep 3, 2026	1,001-5,000	423
	“Construction Sciences is a construction materials testing, geotechnical engineering, environmental consulting and specialised testing firm.” Source: company website · checked Sep 3, 2026
3	PSMIndirect evidence	North Ryde, AustraliaHQ checked Sep 3, 2026	51-200	222
	“PSM provides specialised design and investigation services for engineering in rock, soil and water.” Source: company website · checked Sep 3, 2026
4	ATC WilliamsPartial evidence	Mordialloc, AustraliaHQ checked Sep 3, 2026	201-500	220
	“ATC Williams is a consulting engineering company specialising in providing custom solutions for tailings, water, waste, and resource recovery projects.” Source: company website · checked Sep 3, 2026
5	EngenyIndirect evidence	Brisbane, AustraliaHQ checked Sep 3, 2026	201-500	215
	“Now a part of the Egis Group, Engeny provides a wide range of specialist engineering and environmental consultancy services across disciplines.” Source: company website · checked Sep 3, 2026
6	SenversaIndirect evidence	Melbourne, AustraliaHQ checked Sep 3, 2026	201-500	181
	“Senversa is an Australian, employee-owned environmental, engineering & sustainability professional services firm, specialising in the provision of environmental approvals, ground…” Source: company website · checked Sep 3, 2026
7	Water Technology PTY LTDIndirect evidence	Notting Hill, AustraliaHQ checked Sep 3, 2026	51-200	171
	“Since Water Technology has developed a reputation for delivering technically excellent and practically based services to Australia’s water, coastal and environmental sectors.” Source: company website · checked Sep 3, 2026
8	MECPartial evidence	Brisbane City, AustraliaHQ checked Sep 3, 2026	51-200	162
	“MEC is a leading global technical consulting firm dedicated to servicing the mining industry.” Source: company website · checked Sep 3, 2026
9	Alliance GeotechnicalIndirect evidence	Seven Hills, AustraliaHQ checked Sep 3, 2026	51-200	119
	“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: company website · checked Sep 3, 2026
10	FSG Geotechnics FoundationsPartial evidence	Abbotsford, AustraliaHQ checked Sep 3, 2026	51-200	118
	“FSG Geotechnics + Foundations is a leading geotechnical engineering consulting practice which provides specialised geotechnical advice across a range of industry sectors including…” Source: company website · checked Sep 3, 2026
11	Mining ONE ConsultantsIndirect evidence	Melbourne, AustraliaHQ checked Sep 3, 2026	51-200	117
	“Mining One was established in August 2005 to provide technical expertise in the fields of geotechnical engineering, resource geology, mining engineering, processing, numerical…” Source: company website · checked Sep 3, 2026
12	RED Earth Engineering A Geosyntec CompanyIndirect evidence	Spring Hill, AustraliaHQ checked Sep 3, 2026	51-200	114
	“Red Earth Engineering (REE) is a specialist consultancy offering services in geotechnical, environmental and civil engineering with specialist application to Tailings Dams and…” Source: company website · checked Sep 3, 2026
13	Macquarie GeotechnicalIndirect evidence	Bathurst, AustraliaHQ checked Sep 3, 2026	51-200	109
	“Macquarie Geotechnical is a leading provider of geotechnical services, supporting the construction, government, mining, renewable energy, groundwater, and environmental sectors.” Source: company website · checked Sep 3, 2026
14	Hunter H2oIndirect evidence	Mayfield West, AustraliaHQ checked Sep 3, 2026	51-200	95
	“Beca HunterH2O is a diverse, empowered, and trusted team of 300+ water specialists, passionate about healthy and sustainable communities wherever we work.” Source: company website · checked Sep 3, 2026
15	EI AustraliaIndirect evidence	Pyrmont, AustraliaHQ checked Sep 3, 2026	51-200	93
	“Welcome to EI Australia an Australian-owned, ISO 9001, 14001 & 4801 Certified, professional services company providing Environmental, Geotechnical and Structural engineering…” Source: company website · checked Sep 3, 2026
16	SequanaIndirect evidence	Melbourne, AustraliaHQ checked Sep 3, 2026	201-500	88
	“Redefining the future of Australia’s major water infrastructure projects, Sequana is one of Australia’s most accomplished independent client-side project and program management…” Source: company website · checked Sep 3, 2026
17	Pinion AdvisoryIndirect evidence	Clare, AustraliaHQ checked Sep 3, 2026	51-200	77
	“As an Australian-owned consultancy company specialising in agribusiness, water and environment, Pinion Advisory unlocks the potential in our people, our clients and our natural…” Source: company website · checked Sep 3, 2026
18	Qest Infrastructure PTY LTDIndirect evidence	North Geelong, AustraliaHQ checked Sep 3, 2026	201-500	77
	“More than just a Hydro company - We've grown.” Source: company website · checked Sep 3, 2026
19	Bligh TannerIndirect evidence	Fortitude Valley, AustraliaHQ checked Sep 3, 2026	51-200	72
	“With offices in Brisbane and Sydney, Bligh Tanner is a structural, façade, civil, environmental and water engineering consultancy distinguished by its high level of expertise…” Source: company website · checked Sep 3, 2026
20	Westera Partners PTY LTDPartial evidence	Southport, AustraliaHQ checked Sep 3, 2026	51-200	64
	“Westera is a highly respected consulting engineering firm practicing Australia wide in the disciplines of civil, structural and environmental engineering” Source: company website · checked Sep 3, 2026
21	JK GroupIndirect evidence	Macquarie Park, AustraliaHQ checked Sep 3, 2026	51-200	64
	“The JK Group is a proudly employee owned and managed company that values professionalism through honesty, dependability and integrity.” Source: company website · checked Sep 3, 2026
22	Ground Science PTY LTDIndirect evidence	Thomastown, AustraliaHQ checked Sep 3, 2026	51-200	61
	“Ground Science was established in 2003 as a multi-disciplinary engineering company, providing the following services throughout Victoria- Geotechnical Engineering with field and…” Source: company website · checked Sep 3, 2026
23	Triaxial ConsultingPartial evidence	Sydney, AustraliaHQ checked Sep 3, 2026	51-200	57
	“Established in 2012, Triaxial Consulting are a firm of Consulting Civil and Structural Engineers, who provide a suite of specialist consulting engineering services, to all…” Source: company website · checked Sep 3, 2026

Showing 23 of 600 hydrogeological consulting firms based in Australia

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Hydrogeological consulting firms based in Australia at a glance

As of Sep 3, 2026

1-10Median size (employees)

PerthLargest hub · 55 HQs

699Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

368

11-50

165

51-200

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

31–60

478

61–90

3,321

90–180

1,799

180+

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 hydrogeological consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Australia whose own description of what they do matches “hydrogeological consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among hydrogeological consulting 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 an evidence 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, 5,612 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 3, 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.

Hydrogeological consulting firms by metro

Hydrogeological consulting firms in Perth55
Hydrogeological consulting firms in Sydney44
Hydrogeological consulting firms in Brisbane35
Hydrogeological consulting firms in Melbourne32

Frequently asked

How many hydrogeological consulting firms are there based in Australia?

RevenueBase identified 600 hydrogeological consulting 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?

Douglas Partners, headquartered in Rouse Hill, tops this list with the largest team on record.

Which city has the most hydrogeological consulting firms?

Perth leads with 55 headquartered companies, followed by Sydney (44) and Brisbane (35).

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 5,612 verified decision-maker contacts tracked across these 600 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 3, 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 SmartSearch, 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.