Company lists · Data refreshed September 2026

Top 25 Infrastructure design companies based in Sydney, Australia

Name: Infrastructure design companies based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 164 companies tracked

RevenueBase identified 164 infrastructure design companies headquartered in Sydney, Australia as of September 2026 and tracks 20,093 professional contacts across them, including 9,825 with verified work emails. Sydney is the largest hub.

This list covers infrastructure design companies 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 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

164Companies

20,093Contacts tracked

9,825Verified emails

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The 25 largest infrastructure design companies based in Sydney, Australia

Ranked by team size

Top 25 of 164 infrastructure design companies based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure design 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	GHD	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	10001+	14,572 contacts →
	Indirect evidence “We are committed to addressing the world’s biggest challenges in the areas of water, energy and communities.” Source: RevenueBase Database · checked Sep 20, 2026
2	WSP In Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	10001+	3,132 contacts →
	Indirect evidence “We are one of the world’s leading professional services firms, uniting our engineering, advisory and science-based expertise to shape communities to advance humanity.” Source: RevenueBase Database · checked Sep 20, 2026
3	Woolpert Asia-Pacific	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	1,001-5,000	291 contacts →
	Indirect evidence “Woolpert Asia-Pacific embodies all that is Woolpert, with an added focus on this region of the world.” Source: RevenueBase Database · checked Sep 20, 2026
4	RP Infrastructure	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	201-500	280 contacts →
	Indirect evidence “When you need a trusted delivery partner, we're by your side.” Source: RevenueBase Database · checked Sep 20, 2026
5	Connellgriffin	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	184 contacts →
	Partial evidence “ConnellGriffin is a commercial advisory firm operating within the infrastructure industry.” Source: RevenueBase Database · checked Sep 20, 2026
6	MBB Group	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	167 contacts →
	Partial evidence “MBB Group is an independent consultancy firm, specialising in finding and developing innovative, effective solutions to complex infrastructure projects and programs.” Source: RevenueBase Database · checked Sep 20, 2026
7	Turnbull Engineering	Strong evidence	Sydney, AustraliaHQ checked Sep 20, 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 20, 2026
8	Chalouhi	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “Chalouhi is a leading civil engineering and construction company with extensive experience in the industry.” Source: RevenueBase Database · checked Sep 20, 2026
9	Barker Ryan Stewart	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	56 contacts →
	Indirect evidence “At Barker Ryan Stewart, we believe in better.” Source: RevenueBase Database · checked Sep 20, 2026
10	ARCH	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	53 contacts →
	Indirect evidence “Founded in 2014 by John Armstrong, ARCH Artifex (ARCH) is a specialist consultancy dedicated to delivering measurable, outcome-focused solutions in Systems Engineering & Safety…” Source: RevenueBase Database · checked Sep 20, 2026
11	MI Engineers	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	49 contacts →
	Indirect evidence “MI Engineers is a tech-enabled engineering firm with over 40 years of experience.” Source: RevenueBase Database · checked Sep 20, 2026
12	Wsce Warren Smith Consulting Engineers	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 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 20, 2026
13	CWG Project Services	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “CWG Project Services is a multi-disciplinary consultancy firm specialising in the provision of Project and Program Management and Systems Engineering & Safety Assurance services…” Source: RevenueBase Database · checked Sep 20, 2026
14	Engine Room VM	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	34 contacts →
	Indirect evidence “Engine Room advise and manage projects.” Source: RevenueBase Database · checked Sep 20, 2026
15	Ason Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	34 contacts →
	Indirect evidence “Ason Group is a specialist traffic and transportation planning and engineering firm providing consultancy services to both the private and public sectors.” Source: RevenueBase Database · checked Sep 20, 2026
16	BD Infrastructure	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	32 contacts →
	Indirect evidence “We believe in a future that includes healthier, better connected and accessible communities.” Source: RevenueBase Database · checked Sep 20, 2026
17	Nutbrook Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	32 contacts →
	Indirect evidence “Nutbrook Group was established with the objective of integrating a values-driven approach to Consultancy, Engineering and Project Management services.” Source: RevenueBase Database · checked Sep 20, 2026
18	Wizzio	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	51-200	30 contacts →
	Partial evidence “Wizzio – Innovate • Create • Automate Wizzio (formerly ST Consulting (Australia)) is a Sydney-based engineering and design consultancy specialising in Engineering design…” Source: RevenueBase Database · checked Sep 20, 2026
19	BMM Group	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	27 contacts →
	Partial evidence “BMM Group provide project advisory and professional services to large scale infrastructure projects (telecommunications, rail, mining, energy) Our services include project…” Source: RevenueBase Database · checked Sep 20, 2026
20	Alexandra Venice Consulting AVC	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	26 contacts →
	Partial evidence “Alexandra Venice Consulting (AVC) offer independent technical, environmental and project management services to support the development, procurement and delivery of infrastructure…” Source: RevenueBase Database · checked Sep 20, 2026
21	Empire Project Management	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	23 contacts →
	Indirect evidence “Empire Project Management was formed in 2017 by Mark Pritchard.” Source: RevenueBase Database · checked Sep 20, 2026
22	Indus Engineering PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	21 contacts →
	Partial evidence “Indus Engineering is a specialist team of experienced engineering professionals providing project management and advisory services to all infrastructure developments.” Source: RevenueBase Database · checked Sep 20, 2026
23	Paragon Engineering	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 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 20, 2026
24	Bellgrove Advisory	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “Bellgrove Advisory was established in 2013 as an independent infrastructure advisory consultancy with the aim of helping to build sustainable infrastructure that supports our…” Source: RevenueBase Database · checked Sep 20, 2026
25	CROI	Partial evidence	Sydney, AustraliaHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “At Croí (pronounced kree), we are an award-winning team delivering utility project management and design (ASP3 certified) with a commitment to innovation, efficiency, and…” 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: infrastructure design 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 infrastructure design companies.
Partial evidence: Its own public description names part of infrastructure design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure design 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 25 of 164 infrastructure design companies based in Sydney, Australia

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Infrastructure design companies based in Sydney, Australia at a glance

As of Sep 20, 2026

48.9%Verified-email coverage

122.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sydney

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

101

11-50

51-200

201-500

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 164 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 infrastructure design 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 Sydney, Australia whose own description of what they do matches “infrastructure design 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 infrastructure design 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 infrastructure design companies, 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, 9,825 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.

Infrastructure design companies by metro in Australia

Infrastructure design companies in Sydney164
Infrastructure design companies in Melbourne126
Infrastructure design companies in Brisbane108
Infrastructure design companies in Perth58
Infrastructure design companies in Adelaide45
Infrastructure design companies in North Sydney27

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 infrastructure design 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 infrastructure design companies are there based in Sydney, Australia?

RevenueBase identified 164 infrastructure design companies 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 infrastructure design companies?

Sydney leads with 164 headquartered companies, followed by Melbourne (126) and Brisbane (108).

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 9,825 verified decision-maker contacts tracked across these 164 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.