Company lists · Data refreshed September 2026

Top 24 Sustainability and climate change consulting firms based in Australia

Name: Sustainability and climate change consulting firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 733 companies tracked

RevenueBase identified 733 sustainability and climate change consulting firms headquartered in Australia as of September 2026 and tracks 7,168 professional contacts across them, including 3,438 with verified work emails. Sydney is the largest hub.

This list covers sustainability and climate change 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, 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

733Companies

7,168Contacts tracked

3,438Verified emails

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The 24 largest sustainability and climate change consulting firms based in Australia

Ranked by team size

Top 24 of 733 sustainability and climate change consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability and climate change consulting 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	ADP Consulting	Strong evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	201-500	468 contacts →
	Strong evidence “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Source: RevenueBase Database · checked Sep 21, 2026
2	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 21, 2026	201-500	361 contacts →
	Indirect evidence “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Source: RevenueBase Database · checked Sep 21, 2026
3	Umwelt Environmental & Social Consultants	Indirect evidence	Teralba, AustraliaHQ checked Sep 21, 2026	201-500	329 contacts →
	Indirect evidence “Umwelt has been trusted by clients and communities for over 30 years.” Source: RevenueBase Database · checked Sep 21, 2026
4	Jbs&g	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	262 contacts →
	Indirect 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
5	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
6	Ratio Consultants	Indirect evidence	Cremorne, AustraliaHQ checked Sep 21, 2026	51-200	106 contacts →
	Indirect evidence “For more than 30 years, we’ve worked across Australia to deliver integrated solutions that balance the needs of growth, community and the environment.” Source: RevenueBase Database · checked Sep 21, 2026
7	Earth Systems	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	101 contacts →
	Indirect evidence “At Earth Systems, we believe that solving the world’s environmental challenges requires more than just knowledge-it takes innovation and action.” Source: RevenueBase Database · checked Sep 21, 2026
8	Energetics	Partial evidence	North Sydney, AustraliaHQ checked Sep 21, 2026	51-200	94 contacts →
	Partial evidence “Energetics is the climate risk and energy transition expert.” Source: RevenueBase Database · checked Sep 21, 2026
9	Edge Impact	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	84 contacts →
	Indirect evidence “Edge Impact exists to create a world where unsustainable is unthinkable.” Source: RevenueBase Database · checked Sep 21, 2026
10	Rennie	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	80 contacts →
	Partial evidence “Rennie provides strategy, ESG & sustainability, capital advisory, policy and reform, and business advisory services.” Source: RevenueBase Database · checked Sep 21, 2026
11	Nation Partners	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	72 contacts →
	Partial evidence “Nation Partners isn’t your typical consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
12	Pinion Advisory	Indirect evidence	Clare, AustraliaHQ checked Sep 21, 2026	51-200	70 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
13	MRA Consulting Group	Partial evidence	Drummoyne, AustraliaHQ checked Sep 21, 2026	11-50	51 contacts →
	Partial evidence “MRA Consulting Group is one of Australia’s leading environmental consultancy firms, specialising in business and policy reform.” Source: RevenueBase Database · checked Sep 21, 2026
14	Environmental Earth Sciences International Eesi	Partial evidence	Chatswood, AustraliaHQ checked Sep 21, 2026	51-200	49 contacts →
	Partial evidence “EESI Group, a leader in brown environment consulting, serves the mining, waste & landfill, urban development, and farming sectors across Australia and the UK.” Source: RevenueBase Database · checked Sep 21, 2026
15	Marsden Jacob Associates	Indirect evidence	Camberwell, AustraliaHQ checked Sep 21, 2026	11-50	46 contacts →
	Indirect evidence “Marsden Jacob is a collaborative, values-based team of trusted economics, public policy, markets and strategy advisors, committed to supporting our clients to shape the future…” Source: RevenueBase Database · checked Sep 21, 2026
16	ERIAS	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	11-50	46 contacts →
	Indirect evidence “SPECIALISTS IN DELIVERING LIFE-OF-PROJECT ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT AND MANAGEMENT SOLUTIONS ERIAS was founded by experienced environmental professionals with a…” Source: RevenueBase Database · checked Sep 21, 2026
17	BWD Strategic	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	11-50	45 contacts →
	Partial evidence “BWD is a pure-play, independent sustainability consultancy and B Corp with offices in Sydney, New York, Brisbane, Phoenix, and Auckland.” Source: RevenueBase Database · checked Sep 21, 2026
18	RHELM	Partial evidence	Neutral Bay, AustraliaHQ checked Sep 21, 2026	11-50	39 contacts →
	Partial evidence “Rhelm is a specialist consulting company offering professional services to clients in Australia and internationally.” Source: RevenueBase Database · checked Sep 21, 2026
19	ITP Renewables	Indirect evidence	Canberra, AustraliaHQ checked Sep 21, 2026	11-50	39 contacts →
	Indirect evidence “ITP Renewables is Australia’s longest-running, independent, renewable energy consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
20	Nixora Group	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	38 contacts →
	Partial evidence “Nixora Group is a comprehensive consultancy offering a wide spectrum of services, including data management and governance, risk consulting and advisory, system implementation &…” Source: RevenueBase Database · checked Sep 21, 2026
21	EMF Griffiths	Partial evidence	Ashmore, AustraliaHQ checked Sep 21, 2026	51-200	37 contacts →
	Partial evidence “EMF Griffiths is an Australian building services and sustainability consultancy providing ESD, Mechanical, Electrical, Fire, Hydraulics and Vertical Transport engineering services.” Source: RevenueBase Database · checked Sep 21, 2026
22	Wolfpeak	Strong evidence	Port Macquarie, AustraliaHQ checked Sep 21, 2026	11-50	36 contacts →
	Strong evidence “We offer specialist consulting and project services, solving complex strategic and systematic issues across the environmental, natural resource, planning, sustainability, policy…” Source: RevenueBase Database · checked Sep 21, 2026
23	Sustainable Development Consultants PTY LTD	Indirect evidence	Camberwell, AustraliaHQ checked Sep 21, 2026	11-50	34 contacts →
	Indirect evidence “18 years of innovation, pioneering and project delivery.” Source: RevenueBase Database · checked Sep 21, 2026
24	IEMA	Indirect evidence	Merewether, AustraliaHQ checked Sep 21, 2026	11-50	34 contacts →
	Indirect evidence “Founded in 2018, IEMA is dedicated to delivering projects that benefit both businesses and the environment, along with the communities in which they operate.” 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: sustainability and climate change consulting 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 sustainability and climate change consulting firms.
Partial evidence: Its own public description names part of sustainability and climate change consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability and climate change consulting 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 24 of 733 sustainability and climate change consulting firms based in Australia

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Sustainability and climate change consulting firms based in Australia at a glance

As of Sep 21, 2026

48.0%Verified-email coverage

9.8Average contacts per company

1-10Median size (employees)

18.8%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

557

11-50

129

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 733 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 sustainability and climate change consulting 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 “sustainability and climate change consulting 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 sustainability and climate change consulting 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 sustainability and climate change 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 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, 3,438 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.

Sustainability and climate change consulting firms by metro

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 sustainability and climate change consulting 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 sustainability and climate change consulting firms are there based in Australia?

RevenueBase identified 733 sustainability and climate change 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?

ADP Consulting, headquartered in Melbourne, tops this list with the largest team on record.

Which city has the most sustainability and climate change consulting firms?

Sydney leads with 138 headquartered companies, followed by Melbourne (113) and Perth (61).

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 3,438 verified decision-maker contacts tracked across these 733 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.