Company lists · Data refreshed September 2026

Top 25 Environmental impact assessment firms based in Australia

Name: Environmental impact assessment firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 616 companies tracked

RevenueBase identified 616 environmental impact assessment firms headquartered in Australia as of September 2026 and tracks 7,551 professional contacts across them, including 4,182 with verified work emails. Sydney is the largest hub.

This list covers environmental impact assessment 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 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

616Companies

7,551Contacts tracked

4,182Verified emails

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The 25 largest environmental impact assessment firms based in Australia

Ranked by team size

Top 25 of 616 environmental impact assessment firms based in Australia, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental impact assessment 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	EMM Consulting PTY Limited	Indirect evidence	St Leonards, AustraliaHQ checked Sep 19, 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 19, 2026
2	Umwelt Environmental & Social Consultants	Indirect evidence	Teralba, AustraliaHQ checked Sep 19, 2026	201-500	329 contacts →
	Indirect evidence “Umwelt has been trusted by clients and communities for over 30 years.” Source: RevenueBase Database · checked Sep 19, 2026
3	Pitt&sherry	Partial evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	201-500	317 contacts →
	Partial evidence “pitt & sherry is an Australian-owned engineering and environmental consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
4	Jbs&g	Partial evidence	Sydney, AustraliaHQ checked Sep 19, 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 19, 2026
5	Tonkin	Partial evidence	Adelaide, AustraliaHQ checked Sep 19, 2026	201-500	237 contacts →
	Partial evidence “Tonkin is a leading provider of engineering, environmental and consultancy services to private and public organisations.” Source: RevenueBase Database · checked Sep 19, 2026
6	ECO Logical Australia PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 2026	201-500	211 contacts →
	Indirect evidence “We exist to empower people to make a difference.” Source: RevenueBase Database · checked Sep 19, 2026
7	Senversa	Partial evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	201-500	181 contacts →
	Partial evidence “Senversa is an Australian, employee-owned environmental, engineering & sustainability professional services firm, specialising in the provision of environmental approvals, ground…” Source: RevenueBase Database · checked Sep 19, 2026
8	Biosis PTY LTD	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	51-200	136 contacts →
	Indirect evidence “Biosis is a team of qualified and professional consultants, experienced in and passionate about ecology and cultural heritage.” Source: RevenueBase Database · checked Sep 19, 2026
9	Talis Consultants	Indirect evidence	Leederville, AustraliaHQ checked Sep 19, 2026	51-200	108 contacts →
	Indirect evidence “Talis Consultants is now operating throughout Australia.” Source: RevenueBase Database · checked Sep 19, 2026
10	Ecosure	Partial evidence	Burleigh Heads, AustraliaHQ checked Sep 19, 2026	51-200	105 contacts →
	Partial evidence “Ecosure is the largest specialist privately owned environmental consultancy in Queensland, providing services across Australia and the Pacific to major projects, business…” Source: RevenueBase Database · checked Sep 19, 2026
11	Earth Systems	Partial evidence	Port Melbourne, AustraliaHQ checked Sep 19, 2026	51-200	101 contacts →
	Partial 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 19, 2026
12	Epic Environmental	Partial evidence	Brisbane, AustraliaHQ checked Sep 19, 2026	51-200	94 contacts →
	Partial evidence “Epic offers industry leading environmental solutions to national and selected international markets.” Source: RevenueBase Database · checked Sep 19, 2026
13	EI Australia	Partial evidence	Pyrmont, AustraliaHQ checked Sep 19, 2026	51-200	93 contacts →
	Partial evidence “Welcome to EI Australia an Australian-owned, ISO 9001, 14001 & 4801 Certified, professional services company providing Environmental, Geotechnical and Structural engineering…” Source: RevenueBase Database · checked Sep 19, 2026
14	Xenith	Indirect evidence	Brisbane, AustraliaHQ checked Sep 19, 2026	51-200	92 contacts →
	Indirect evidence “Xenith is an established consulting firm that delivers outstanding exploration, mine planning, operational and financial solutions to resources companies in Australia and around…” Source: RevenueBase Database · checked Sep 19, 2026
15	CETEC	Indirect evidence	Melbourne, AustraliaHQ checked Sep 19, 2026	11-50	81 contacts →
	Indirect evidence “CETEC is an independent consultancy delivering scientific and technical solutions.” Source: RevenueBase Database · checked Sep 19, 2026
16	Natural Area	Partial evidence	Malaga, AustraliaHQ checked Sep 19, 2026	51-200	76 contacts →
	Partial evidence “Natural Area is a wholly Western Australian owned and operated company providing environmental consulting and on-ground environmental management to government, property…” Source: RevenueBase Database · checked Sep 19, 2026
17	Opec Systems	Partial evidence	Lennox Head, AustraliaHQ checked Sep 19, 2026	51-200	70 contacts →
	Partial evidence “Public and private sector organisations across the globe choose OPEC Systems to creatively and intelligently solve their environmental engineering challenges.” Source: RevenueBase Database · checked Sep 19, 2026
18	Ecology And Heritage Partners PTY LTD	Indirect evidence	Ascot Vale, AustraliaHQ checked Sep 19, 2026	51-200	68 contacts →
	Indirect evidence “Thank you for visiting Ecology and Heritage Partners.” Source: RevenueBase Database · checked Sep 19, 2026
19	Hydrobiology	Partial evidence	Milton, AustraliaHQ checked Sep 19, 2026	11-50	67 contacts →
	Partial evidence “Hydrobiology is an Environmental Consulting Company offering integrated services in the physical, biological and chemical processes of environmental systems with a particular…” Source: RevenueBase Database · checked Sep 19, 2026
20	E2m	Partial evidence	Milton, AustraliaHQ checked Sep 19, 2026	11-50	64 contacts →
	Partial evidence “At e2m, we set the consultancy standard for terrestrial ecology, environmental approvals and environmental compliance.” Source: RevenueBase Database · checked Sep 19, 2026
21	Barnson PTY LTD	Partial evidence	Dubbo, AustraliaHQ checked Sep 19, 2026	51-200	60 contacts →
	Partial evidence “Barnson Pty Ltd is an independent multi-disciplinary consulting firm offering professional services in the fields of town planning, bushfire assessments, landscape architecture…” Source: RevenueBase Database · checked Sep 19, 2026
22	ARCH	Indirect evidence	Sydney, AustraliaHQ checked Sep 19, 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 19, 2026
23	Agon Environmental	Partial evidence	Fullarton, AustraliaHQ checked Sep 19, 2026	11-50	52 contacts →
	Partial evidence “Agon Environmental is an Australian consultancy delivering quality environmental services.” Source: RevenueBase Database · checked Sep 19, 2026
24	MRA Consulting Group	Partial evidence	Drummoyne, AustraliaHQ checked Sep 19, 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 19, 2026
25	Environmental Earth Sciences International Eesi	Partial evidence	Chatswood, AustraliaHQ checked Sep 19, 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 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: environmental impact assessment 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 environmental impact assessment firms.
Partial evidence: Its own public description names part of environmental impact assessment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental impact assessment 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 616 environmental impact assessment firms based in Australia

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Environmental impact assessment firms based in Australia at a glance

As of Sep 19, 2026

55.4%Verified-email coverage

12.3Average contacts per company

1-10Median size (employees)

8.1%Largest-city concentration · Sydney

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

407

11-50

161

51-200

201-500

501-1,000

1,001-5,000

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 616 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 environmental impact assessment 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 “environmental impact assessment 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 environmental impact assessment 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 environmental impact assessment 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, 4,182 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.

Environmental impact assessment 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 environmental impact assessment 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 environmental impact assessment firms are there based in Australia?

RevenueBase identified 616 environmental impact assessment 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?

EMM Consulting PTY Limited, headquartered in St Leonards, tops this list with the largest team on record.

Which city has the most environmental impact assessment firms?

Sydney leads with 50 headquartered companies, followed by Melbourne (44) and Perth (44).

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 4,182 verified decision-maker contacts tracked across these 616 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.