Company lists · Data refreshed September 2026

Top 25 Ecological consulting firms based in Australia

Name: Ecological consulting firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 697 companies tracked

RevenueBase identified 697 ecological consulting firms headquartered in Australia as of September 2026 and tracks 7,534 professional contacts across them, including 4,009 with verified work emails and 636 with mobile numbers. Melbourne is the largest hub.

This list covers ecological 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

697Companies

7,534Contacts tracked

4,009Verified emails

636Mobile numbers

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The 25 largest ecological consulting firms based in Australia

Ranked by team size

Top 25 of 697 ecological consulting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to ecological 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	Umwelt Environmental & Social Consultants	Indirect evidence	Melbourne, Australia	201-500	326 contacts →
	Indirect evidence “Umwelt has been trusted by clients and communities for over 30 years.” Source: RevenueBase Database · checked Sep 1, 2026
2	Jbs&g	Indirect evidence	Perth, Australia	201-500	264 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 1, 2026
3	Intera Incorporated	Partial evidence	Perth, Australia	201-500	261 contacts →
	Partial evidence “Established in 1974, INTERA is a geosciences and engineering consulting firm focused on providing water resources and supply, environmental, mining, radioactive waste isolation…” Source: RevenueBase Database · checked Sep 1, 2026
4	ECO Logical Australia PTY LTD	Indirect evidence	Huskisson, Australia	201-500	221 contacts →
	Indirect evidence “We exist to empower people to make a difference.” Source: RevenueBase Database · checked Sep 1, 2026
5	Alluvium Group	Partial evidence	Fortitude Valley, Australia	201-500	141 contacts →
	Partial evidence “The Alluvium Group is an employee-owned consulting practice founded in 2006 to provide advice to government and private organisations on issues impacting on the build and natural…” Source: RevenueBase Database · checked Sep 1, 2026
6	Biosis PTY LTD	Indirect evidence	Wollongong, Australia	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 1, 2026
7	NICHE	Indirect evidence	Bulli, Australia	51-200	134 contacts →
	Indirect evidence “Niche is the largest privately-owned specialist biodiversity and heritage consultancy in Australia.” Source: RevenueBase Database · checked Sep 1, 2026
8	Ecosure	Indirect evidence	Mawson Lakes, Australia	51-200	104 contacts →
	Indirect 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 1, 2026
9	Toolijooa Environmental Restoration	Indirect evidence	West Hoxton, Australia	51-200	101 contacts →
	Indirect evidence “Toolijooa Environmental Restoration is a leading provider of environmental management and restoration services throughout the Greater Sydney Region, the Hunter and beyond.” Source: RevenueBase Database · checked Sep 1, 2026
10	Emerge Associates	Indirect evidence	Perth, Australia	51-200	91 contacts →
	Indirect evidence “Emerge Associates are landscape architects and environmental consultants, integrating science and design to create great spaces, manage sensitive places and foster thriving…” Source: RevenueBase Database · checked Sep 1, 2026
11	RMCG	Indirect evidence	Camberwell, Australia	51-200	79 contacts →
	Indirect evidence “Bringing clarity to complexity.” Source: RevenueBase Database · checked Sep 1, 2026
12	Pinion Advisory	Indirect evidence	Mildura, Australia	51-200	77 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 1, 2026
13	Natural Area	Partial evidence	Whiteman, Australia	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 1, 2026
14	Opec Systems	Indirect evidence	Hemmant, Australia	51-200	69 contacts →
	Indirect 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 1, 2026
15	Ecology And Heritage Partners PTY LTD	Indirect evidence	Turner, Australia	51-200	67 contacts →
	Indirect evidence “Thank you for visiting Ecology and Heritage Partners.” Source: RevenueBase Database · checked Sep 1, 2026
16	Nature Advisory	Partial evidence	Hawthorn East, Australia	51-200	64 contacts →
	Partial evidence “Nature Advisory is an independent ecological consultancy that proactively balances project outcomes with biodiversity protection.” Source: RevenueBase Database · checked Sep 1, 2026
17	Acacia Environmental Management	Indirect evidence	St. Andrews, Australia	201-500	59 contacts →
	Indirect evidence “OUR MISSION IS TO PROTECT NATURES GREATEST CAPITAL Acacia remains committed to helping government, industry, business and communities use and enjoy the natural environment for…” Source: RevenueBase Database · checked Sep 1, 2026
18	Barnson PTY LTD	Partial evidence	Baulkham Hills, Australia	51-200	57 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 1, 2026
19	PTG Consulting	Partial evidence	Ashmore, Australia	51-200	53 contacts →
	Partial evidence “With a suite of highly skilled engineers, PTG Consulting provides clients with the benefit of diverse and extensive experience and customised forward-thinking solutions.” Source: RevenueBase Database · checked Sep 1, 2026
20	Ecocene	Partial evidence	Margaret River, Australia	51-200	52 contacts →
	Partial evidence “Ecocene combines ecological expertise with data intelligence to build conservation economies.” Source: RevenueBase Database · checked Sep 1, 2026
21	Western Environmental	Indirect evidence	Richmond, Australia	51-200	52 contacts →
	Indirect evidence “We’re extraordinary consultants who protect and enhance the environment and value our community.” Source: RevenueBase Database · checked Sep 1, 2026
22	Environmental Earth Sciences International Eesi	Partial evidence	Chatswood, Australia	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 1, 2026
23	O2marine	Indirect evidence	Geraldton, Australia	51-200	48 contacts →
	Indirect evidence “O2 Marine provides clients with efficient and high quality environmental and project outcomes.” Source: RevenueBase Database · checked Sep 1, 2026
24	EDP Consultants Australia	Indirect evidence	St Leonards, Australia	51-200	46 contacts →
	Indirect evidence “As part of the RSK Group, EDP Consultants (EDP) is a boutique provider of Environmental and Occupational Hygiene solutions across a broad range of industry sectors.” Source: RevenueBase Database · checked Sep 1, 2026
25	ENV Solutions	Indirect evidence	Coffs Harbour, Australia	51-200	35 contacts →
	Indirect evidence “ENV Solutions provide tailor-made solutions to complex environmental issues.” Source: RevenueBase Database · checked Sep 1, 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: ecological 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 ecological consulting firms.
Partial evidence: Its own public description names part of ecological consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ecological 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 25 of 697 ecological consulting firms based in Australia

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Ecological consulting firms based in Australia at a glance

As of Sep 1, 2026

53.2%Verified-email coverage

8.4%Mobile-number coverage

10.8Average contacts per company

1-10Median size (employees)

7.7%Largest-city concentration · Melbourne

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

461

11-50

182

51-200

201-500

501-1,000

1,001-5,000

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 ecological 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 “ecological 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 ecological 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 ecological 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, 4,009 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 1, 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.

Ecological 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 ecological 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 ecological consulting firms are there based in Australia?

RevenueBase identified 697 ecological 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?

Umwelt Environmental & Social Consultants, headquartered in Melbourne, tops this list with the largest team on record.

Which city has the most ecological consulting firms?

Melbourne leads with 54 headquartered companies, followed by Perth (45) and Sydney (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 4,009 verified decision-maker contacts tracked across these 697 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 1, 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.