Company lists · Data refreshed September 2026

Top 23 Hydrogeological consultants based in Sydney, Australia

Name: Hydrogeological consultants based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 136 companies tracked

RevenueBase identified 136 hydrogeological consultants headquartered in Sydney, Australia as of September 2026 and tracks 1,751 professional contacts across them, including 956 with verified work emails. Perth is the largest hub.

This list covers hydrogeological consultants headquartered in Sydney, 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 21, 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 21, 2026 86% judged on-target in blind review

136Companies

1,751Contacts tracked

956Verified emails

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The 23 largest hydrogeological consultants based in Sydney, Australia

Ranked by team size

Top 23 of 136 hydrogeological consultants based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogeological consultants: 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	Acor Consultants	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	501-1,000	423 contacts →
	Partial evidence “Founded in 1997, ACOR Consultants began as a group of engineers with a unique set of personal and professional values providing specialist consulting services.” Source: RevenueBase Database · checked Sep 21, 2026
2	Jbs&g	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	262 contacts →
	Partial evidence “Established in 1996, JBS & G is one of Australia’s leading environmental consultancies with offices in Sydney, Melbourne, Perth, Adelaide, Brisbane, Canberra, Darwin, Wollongong…” Source: RevenueBase Database · checked Sep 21, 2026
3	ECO Logical Australia PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	211 contacts →
	Indirect evidence “We exist to empower people to make a difference.” Source: RevenueBase Database · checked Sep 21, 2026
4	Turnbull Engineering	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	73 contacts →
	Indirect evidence “Turnbull is a select team of highly motivated engineering professionals specialising in the design of civil infrastructure, including transport, energy and water and mining assets.” Source: RevenueBase Database · checked Sep 21, 2026
5	Triaxial Consulting	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	57 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
6	SCP Consulting PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	52 contacts →
	Partial evidence “SCP Consulting is a national engineering consultancy with over 40 years of experience delivering innovative, practical design and management solutions across Australia.” Source: RevenueBase Database · checked Sep 21, 2026
7	Witt Consulting	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “Specialist engineers consulting in the fields of temporary works, structural, geotechnical and heritage reuse.” Source: RevenueBase Database · checked Sep 21, 2026
8	Wsce Warren Smith Consulting Engineers	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	40 contacts →
	Indirect evidence “WSce is a multi-discipline Australian-owned consulting engineering firm specialising in civil, water, hydraulic, fire services (wet & dry fire) and specialty water and wasterwater…” Source: RevenueBase Database · checked Sep 21, 2026
9	Wmawater	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	29 contacts →
	Partial evidence “WMAWater is specialist engineering consultancy providing engineering analysis and advice in a range of water-related fields.” Source: RevenueBase Database · checked Sep 21, 2026
10	Deboke Engineering Consultants	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	24 contacts →
	Indirect evidence “Some Engineers focus on form, other focus on function.” Source: RevenueBase Database · checked Sep 21, 2026
11	Beck Engineering PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “Beck Engineering specialises in planning, engineering and applied mechanics for extreme geotechnical environments or where corporate or expert geotechnical experience is being…” Source: RevenueBase Database · checked Sep 21, 2026
12	Paragon Engineering	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “Paragon Engineering is a specialist consultancy operating across Australia, delivering practical and innovative engineering solutions to clients in the transport infrastructure…” Source: RevenueBase Database · checked Sep 21, 2026
13	Waterproofing Assurance PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	16 contacts →
	Indirect evidence “Waterproofing Assurance provides a unique quality assurance service to our clients for waterproofing membrane systems.” Source: RevenueBase Database · checked Sep 21, 2026
14	Catchment Simulation Solutions	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	15 contacts →
	Indirect evidence “Catchment Simulation Solutions provides engineering consulting services in the water field with a special focus on hydrologic and hydraulic modelling.” Source: RevenueBase Database · checked Sep 21, 2026
15	Centric Building Services Engineers	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “Centric Building Services Engineers Centric Building Services Engineers are a team of highly experienced consulting engineering experts in building services.” Source: RevenueBase Database · checked Sep 21, 2026
16	Fichtner Australia	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	13 contacts →
	Partial evidence “The Fichtner Group is one of the leading independent engineering consultancy firms in the world.” Source: RevenueBase Database · checked Sep 21, 2026
17	Aargus PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	13 contacts →
	Indirect evidence “The Aargus Group is a fully owned and operated Australian company that has been structured and tailored to suit market needs.” Source: RevenueBase Database · checked Sep 21, 2026
18	S&g Consultants PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “S&G Consultants Pty Ltd is a dynamic organisation founded in 2003 by Managing Director Samer El Haddad in response to a market demand for integrated consulting engineering…” Source: RevenueBase Database · checked Sep 21, 2026
19	N2 Engineering Consultants	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial evidence “n2 Engineering Consultants provides innovative, reliable, and Australian-designed engineering solutions.” Source: RevenueBase Database · checked Sep 21, 2026
20	Soilsrock Engineering PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	9 contacts →
	Indirect evidence “Soilsrock Engineering Pty Ltd is a private Australian property company specialised in geotechnical, environmental and structural engineering consulting within the Building and…” Source: RevenueBase Database · checked Sep 21, 2026
21	GRC Hydro PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1-10	8 contacts →
	Indirect evidence “GRC Hydro is a hydrology and water engineering firm based in Sydney, Australia.” Source: RevenueBase Database · checked Sep 21, 2026
22	Expert Water Modelling	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Expert Water Modelling is an engineering sub-consultancy that provides Computational Fluid Dynamics modelling services to larger consultants in the water and wastewater industries.” Source: RevenueBase Database · checked Sep 21, 2026
23	Adea Power Consulting	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	5 contacts →
	Indirect evidence “ADEA Power Consulting Pty.” Source: RevenueBase Database · checked Sep 21, 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: hydrogeological consultants. 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 hydrogeological consultants.
Partial evidence: Its own public description names part of hydrogeological consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogeological consultants. 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 136 hydrogeological consultants based in Sydney, Australia

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Hydrogeological consultants based in Sydney, Australia at a glance

As of Sep 21, 2026

54.6%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

150.0%Largest-city concentration · Perth

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole Australia list rather than for Sydney, so it is reported there. Company counts and contact totals on this page are exact for Sydney, over 136 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 hydrogeological consultants, 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 Sydney, Australia whose own description of what they do matches “hydrogeological consultants”. 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 hydrogeological consultants), 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 hydrogeological consultants, and records with no verified work email. Companies headquartered outside Sydney 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, 956 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 21, 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 consultants by metro in Australia

Hydrogeological consultants in Perth204
Hydrogeological consultants in Sydney136
Hydrogeological consultants in Brisbane132
Hydrogeological consultants in Melbourne124
Hydrogeological consultants in Adelaide56
Hydrogeological consultants in West Perth37

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 hydrogeological consultants, 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 hydrogeological consultants are there based in Sydney, Australia?

RevenueBase identified 136 hydrogeological consultants headquartered in Sydney, 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?

Acor Consultants, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most hydrogeological consultants?

Perth leads with 204 headquartered companies, followed by Sydney (136) and Brisbane (132).

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 956 verified decision-maker contacts tracked across these 136 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 21, 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.