Company lists · Data verified August 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 Verified Aug 28, 2026 697 companies tracked

There are 697 ecological consulting firms headquartered in Australia (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Umwelt Environmental & Social Consultants	Melbourne	201-500	326	234
2	Jbs&g	Perth	201-500	264	225
3	Intera Incorporated	Perth	201-500	261	188
4	ECO Logical Australia PTY LTD	Huskisson	201-500	221	119
5	Alluvium Group	Fortitude Valley	201-500	141	106
6	Biosis PTY LTD	Wollongong	51-200	136	100
7	NICHE	Bulli	51-200	134	86
8	Ecosure	Mawson Lakes	51-200	104	57
9	Toolijooa Environmental Restoration	West Hoxton	51-200	101	11
10	Emerge Associates	Perth	51-200	91	77
11	RMCG	Camberwell	51-200	79	65
12	Pinion Advisory	Mildura	51-200	77	54
13	Natural Area	Whiteman	51-200	76	19
14	Opec Systems	Hemmant	51-200	69	39
15	Ecology And Heritage Partners PTY LTD	Turner	51-200	67	43
16	Nature Advisory	Hawthorn East	51-200	64	50
17	Acacia Environmental Management	St. Andrews	201-500	59	32
18	Barnson PTY LTD	Baulkham Hills	51-200	57	43
19	PTG Consulting	Ashmore	51-200	53	39
20	Ecocene	Margaret River	51-200	52	29
21	Western Environmental	Richmond	51-200	52	1
22	Environmental Earth Sciences International Eesi	Chatswood	51-200	49	29
23	O2marine	Geraldton	51-200	48	34
24	EDP Consultants Australia	St Leonards	51-200	46	32
25	ENV Solutions	Coffs Harbour	51-200	35	23

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 Aug 28, 2026

1-10Median size (employees)

MelbourneLargest hub · 54 HQs

636Contacts with mobile numbers

7Emails re-verified in last 30 days

Companies by employee count

1-10

461

11-50

182

51-200

201-500

501-1,000

1,001-5,000

Ecological consulting firms by metro

Metro	Companies
Ecological consulting firms in Melbourne	54
Ecological consulting firms in Perth	45
Ecological consulting firms in Sydney	44
Ecological consulting firms in Brisbane	44
Ecological consulting firms in Newcastle	14
Ecological consulting firms in Adelaide	13
Ecological consulting firms in Gold Coast	9

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “ecological consulting firms”, with match quality audited by blind human judging, and headquartered in Australia.
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: Contact records re-verify on a rolling cadence; 7 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many ecological consulting firms are there based in Australia?

There are 697 ecological consulting firms headquartered in Australia as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.