Company lists · Data refreshed September 2026

Top 25 Water infrastructure engineering firms based in Sydney, Australia

Name: Water infrastructure engineering firms based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 65 companies tracked

RevenueBase identified 65 water infrastructure engineering firms headquartered in Sydney, Australia as of September 2026 and tracks 15,171 professional contacts across them, including 6,957 with verified work emails. Sydney is the largest hub.

This list covers water infrastructure engineering firms 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 19, 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 19, 2026 86% judged on-target in blind review

65Companies

15,171Contacts tracked

6,957Verified emails

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The 25 largest water infrastructure engineering firms based in Sydney, Australia

Ranked by team size

Top 25 of 65 water infrastructure engineering firms based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water infrastructure engineering 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	GHD	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	10001+	14,572 contacts →
	Partial evidence “We are committed to addressing the world’s biggest challenges in the areas of water, energy and communities.” Source: RevenueBase Database · checked Sep 19, 2026
2	Hydroflux PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	95 contacts →
	Partial evidence “Water l Science l Technology The Hydroflux Group is a team of water and wastewater treatment experts harnessing the power of world leading research and technologies for a more…” Source: RevenueBase Database · checked Sep 19, 2026
3	Turnbull Engineering	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	73 contacts →
	Strong 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 19, 2026
4	Triaxial Consulting	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	57 contacts →
	Partial 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 19, 2026
5	Wsce Warren Smith Consulting Engineers	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	51-200	40 contacts →
	Strong 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 19, 2026
6	Wmawater	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	29 contacts →
	Strong evidence “WMAWater is specialist engineering consultancy providing engineering analysis and advice in a range of water-related fields.” Source: RevenueBase Database · checked Sep 19, 2026
7	Catchment Simulation Solutions	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	15 contacts →
	Strong 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 19, 2026
8	Centric Building Services Engineers	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial 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 19, 2026
9	Civil Structures Studio	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	11 contacts →
	Partial evidence “Civil Structures Studio (CSS) is a collaboration of passionate and experienced individuals who revel in delivering complex structural engineering projects.” Source: RevenueBase Database · checked Sep 19, 2026
10	Certus Projects	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “Certus Projects is an engineering contractor with the infrastructure sector.” Source: RevenueBase Database · checked Sep 19, 2026
11	Surex Consulting	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	10 contacts →
	Partial evidence “SUREX Consulting is setting a new benchmark for premium engineering services, delivering exceptional designs that exceed expectations and ensure buildings are built to the highest…” Source: RevenueBase Database · checked Sep 19, 2026
12	S&g Consultants PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 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 19, 2026
13	N2 Engineering Consultants	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	10 contacts →
	Partial evidence “n2 Engineering Consultants provides innovative, reliable, and Australian-designed engineering solutions.” Source: RevenueBase Database · checked Sep 19, 2026
14	GRC Hydro PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	8 contacts →
	Strong evidence “GRC Hydro is a hydrology and water engineering firm based in Sydney, Australia.” Source: RevenueBase Database · checked Sep 19, 2026
15	Sphere Infrastructure Partners	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “Sphere was founded in 2018 in recognition of the need for advisors with specific environmental sector experience, development capability and expertise in delivering complex…” Source: RevenueBase Database · checked Sep 19, 2026
16	Expert Water Modelling	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	6 contacts →
	Strong 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 19, 2026
17	Greenstar Water Solutions PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	6 contacts →
	Partial evidence “What We Do: We design, supply and install Irrigation, Pumps and filtration and Water Feature Hydraulics using the latest technology, for any sized project including Sports fields…” Source: RevenueBase Database · checked Sep 19, 2026
18	Metric Engineering	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	5 contacts →
	Strong evidence “Metric Engineering is a structural and stormwater engineering firm that specializes in designing robust and resilient infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
19	Carnview Civil	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	3 contacts →
	Strong evidence “Carnview is a leading civil engineering firm specializing in pipeline and utility infrastructure development and construction projects.” Source: RevenueBase Database · checked Sep 19, 2026
20	Assetlife Alliance	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	3 contacts →
	Partial evidence “Let's build the future of water asset management - together!” Source: RevenueBase Database · checked Sep 19, 2026
21	MDC Water PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	3 contacts →
	Partial evidence “MDC Water provides water and wastewater treatment solutions for all types of applications, from domestic equipment to industrial turnkey plants.” Source: RevenueBase Database · checked Sep 19, 2026
22	Graymade	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	3 contacts →
	Indirect evidence “Graymade is a specialist civil construction and maintenance contractor, delivering safe, reliable, and cost-effective services to Tier 1 and Tier 2 contractors, utilities, and…” Source: RevenueBase Database · checked Sep 19, 2026
23	LP Consulting Australia PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
24	Marr Industries	Strong evidence	Sydney, AustraliaHQ checked Sep 19, 2026	11-50	2 contacts →
	Strong evidence “We are leaders in the manufacture and structural maintenance of high-volume, high-rise water tanks and infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
25	CST Wastewater Solutions	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “CST offers the latest in specialised mechanical and process equipment, built from our ‘hands-on’ experience in the industry and a clear understanding of our clients’ needs.” Source: RevenueBase Database · checked Sep 19, 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: water infrastructure engineering 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 water infrastructure engineering firms.
Partial evidence: Its own public description names part of water infrastructure engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water infrastructure engineering 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 65 water infrastructure engineering firms based in Sydney, Australia

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Water infrastructure engineering firms based in Sydney, Australia at a glance

As of Sep 19, 2026

45.9%Verified-email coverage

233.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

10001+

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 65 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 water infrastructure engineering 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 Sydney, Australia whose own description of what they do matches “water infrastructure engineering 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 water infrastructure engineering 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 water infrastructure engineering firms, 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, 6,957 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 19, 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.

Water infrastructure engineering firms by metro in Australia

Water infrastructure engineering firms in Sydney65
Water infrastructure engineering firms in Melbourne40
Water infrastructure engineering firms in Brisbane28

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 water infrastructure engineering 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 water infrastructure engineering firms are there based in Sydney, Australia?

RevenueBase identified 65 water infrastructure engineering firms 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?

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

Which city has the most water infrastructure engineering firms?

Sydney leads with 65 headquartered companies, followed by Melbourne (40) and Brisbane (28).

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 6,957 verified decision-maker contacts tracked across these 65 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 19, 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.