Company lists · Data refreshed September 2026

Top 23 Environmental engineering staffing companies based in Sydney, Australia

Name: Environmental engineering staffing companies based in Sydney, Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 58 companies tracked

RevenueBase identified 58 environmental engineering staffing companies headquartered in Sydney, Australia as of September 2026 and tracks 317 professional contacts across them, including 79 with verified work emails. Across Australia, Sydney is the largest hub for this category.

This list covers environmental engineering staffing 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 28, 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 28, 2026 86% judged on-target in blind review

58Companies

317Contacts tracked

79Verified emails

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The 23 largest environmental engineering staffing companies based in Sydney, Australia

Ranked by team size

Top 23 of 58 environmental engineering staffing companies based in Sydney, Australia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental engineering staffing 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	Wsce Warren Smith Consulting Engineers	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	51-200	40 contacts →
	Partial 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 28, 2026
2	Astar Recruitment	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	34 contacts →
	Indirect evidence “ASTAR Recruitment was launched in 2006 and we have since had a rapid growth to being a leader and renown specialist in Human Resources and Recruitment.” Source: RevenueBase Database · checked Sep 28, 2026
3	Wyn&co	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Wyn & Co is an Australian, privately owned employment group specialising in permanent, contract and temporary recruitment solutions.” Source: RevenueBase Database · checked Sep 28, 2026
4	Centric Building Services Engineers	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	14 contacts →
	Partial evidence “Centric Building Services Engineers Centric Building Services Engineers are a team of highly experienced consulting engineering experts in building services.” Source: RevenueBase Database · checked Sep 28, 2026
5	Aargus PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	51-200	13 contacts →
	Indirect evidence “The Aargus Group is a fully owned and operated Australian company that has been structured and tailored to suit market needs.” Source: RevenueBase Database · checked Sep 28, 2026
6	Surex Consulting	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	10 contacts →
	Partial evidence “SUREX Consulting is setting a new benchmark for premium engineering services, delivering exceptional designs that exceed expectations and ensure buildings are built to the highest…” Source: RevenueBase Database · checked Sep 28, 2026
7	AAR Consulting Group	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “AAR Consulting Group is a small to medium recruitment agency (SME) focusing exclusively on providing recruitment services to the Local Government, State Government, Federal…” Source: RevenueBase Database · checked Sep 28, 2026
8	S&g Consultants PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	10 contacts →
	Partial evidence “S&G Consultants Pty Ltd is a dynamic organisation founded in 2003 by Managing Director Samer El Haddad in response to a market demand for integrated consulting engineering…” Source: RevenueBase Database · checked Sep 28, 2026
9	Unify Recruitment	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Unify was established to create a mechanical and electrical industry-specific agency.” Source: RevenueBase Database · checked Sep 28, 2026
10	Curtis Barrier International	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	11-50	4 contacts →
	Strong evidence “Curtis Barrier International - a civil & environmental engineering company that consults, designs and installs engineering membrane containment systems in Australia & overseas.” Source: RevenueBase Database · checked Sep 28, 2026
11	DTG Talent Solutions	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “DTG provides practical workforce solutions for businesses operating in demanding environments.” Source: RevenueBase Database · checked Sep 28, 2026
12	DXJ Recruitment	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	4 contacts →
	Strong evidence “Engineering Recruitment for - Ground Engineering (Geotechnical, Geological, piling); Environmental (Contaminated Lands, Management, Remediation); OHS/WHS (Occupational Hygiene…” Source: RevenueBase Database · checked Sep 28, 2026
13	Cookson & Roberts	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Natasha Cookson & Anna Roberts are engineering recruitment specialists who work with businesses in the consulting and engineering space to match the right talent to the right…” Source: RevenueBase Database · checked Sep 28, 2026
14	LP Consulting Australia PTY LTD	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
15	Marsupial Lion	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Marsupial Lion specialises in environmental planning and management of complex infrastructure projects.” Source: RevenueBase Database · checked Sep 28, 2026
16	Chris Jacotine & Partners	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “Chris Jacotine & Partners is a consulting engineering company specialising in building services and environmentally sustainable design advice.” Source: RevenueBase Database · checked Sep 28, 2026
17	Serp Recruitment	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Experts in connecting top-tier engineering and construction talent with leading companies in the Transport, Power, Energy, Resources and Water sectors.” Source: RevenueBase Database · checked Sep 28, 2026
18	Constructeng Australia Recruitment	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “Call 1300 AUSJOB ConstructEng Australia specialises in the recruitment of Technical staff within Construction, Engineering, Property, Environmental and Workplace Safety industries.” Source: RevenueBase Database · checked Sep 28, 2026
19	TLM Civil	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
20	KEY Recruitment Services	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Based in Sydney, Australia, Key Recruitment Services provides expert market knowledge and advice to employers and professionals in the Engineering and Construction sectors.” Source: RevenueBase Database · checked Sep 28, 2026
21	Gaia Talents	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “At Gaia Talents, we bring over 15 years of experience in the recruitment industry, with a dedicated focus on environmental and sustainability roles in Australia, Singapore and…” Source: RevenueBase Database · checked Sep 28, 2026
22	Bare Recruit And Consult PTY LTD	Strong evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	1 contacts →
	Strong evidence “BARE is a boutique staffing agency, specialising in Insurance, Not For Profit, Disaster Management, Remedial Construction & Engineering Services.” Source: RevenueBase Database · checked Sep 28, 2026
23	DR Upsilon Environments PTY LTD	Partial evidence	Sydney, AustraliaHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “A specialised environmental consulting firm to deliver strategic solutions for contaminated site, hydrogeological modelling, environmental monitoring, hazardous materials and…” Source: RevenueBase Database · checked Sep 28, 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 engineering staffing 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 environmental engineering staffing companies.
Partial evidence: Its own public description names part of environmental engineering staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental engineering staffing 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 23 of 58 environmental engineering staffing companies based in Sydney, Australia

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Environmental engineering staffing companies based in Sydney, Australia at a glance

As of Sep 28, 2026

24.9%Verified-email coverage

5.5Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

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 58 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 engineering staffing 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 “environmental engineering staffing 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 environmental engineering staffing 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 environmental engineering staffing 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, 79 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 28, 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 engineering staffing companies by metro in Australia

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 engineering staffing 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 environmental engineering staffing companies are there based in Sydney, Australia?

RevenueBase identified 58 environmental engineering staffing 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?

Wsce Warren Smith Consulting Engineers, headquartered in Sydney, tops this list with the largest team on record.

Which city in Australia has the most environmental engineering staffing companies?

Sydney leads Australia with 58 headquartered companies, followed by Perth (30) and Melbourne (29).

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 79 verified decision-maker contacts tracked across these 58 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 28, 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.