Company lists · Data refreshed September 2026

Top 25 Engineering outsourcing firms based in Australia

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 852 companies tracked

RevenueBase identified 852 engineering outsourcing firms headquartered in Australia as of September 2026 and tracks 7,830 professional contacts across them, including 3,618 with verified work emails. Melbourne is the largest hub.

This list covers engineering outsourcing 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 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

852Companies

7,830Contacts tracked

3,618Verified emails

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The 25 largest engineering outsourcing firms based in Australia

Ranked by team size

Top 25 of 852 engineering outsourcing firms based in Australia, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to engineering outsourcing 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	TTW	Partial evidence	North Sydney, AustraliaHQ checked Sep 28, 2026	501-1,000	472 contacts →
	Partial evidence “Great engineering starts with great people.” Source: RevenueBase Database · checked Sep 28, 2026
2	GPA Engineering	Partial evidence	Unley, AustraliaHQ checked Sep 28, 2026	201-500	346 contacts →
	Partial evidence “A highly experienced, multidisciplinary engineering and management firm, GPA has consulted and provided engineering, procurement and construction management (EPCM) services, since…” Source: RevenueBase Database · checked Sep 28, 2026
3	Aerison	Indirect evidence	Bibra Lake, AustraliaHQ checked Sep 28, 2026	201-500	166 contacts →
	Indirect evidence “An Agile EPC, Field Services and Solutions Provider to the Energy & Resources Industries.” Source: RevenueBase Database · checked Sep 28, 2026
4	Partum Engineering	Partial evidence	Burswood, AustraliaHQ checked Sep 28, 2026	201-500	154 contacts →
	Partial evidence “Partum is an Australian based company providing engineering design and project consulting advice.” Source: RevenueBase Database · checked Sep 28, 2026
5	Allion Technologies	Indirect evidence	Chatswood, AustraliaHQ checked Sep 28, 2026	201-500	123 contacts →
	Indirect evidence “Rise from the Ordinary.” Source: RevenueBase Database · checked Sep 28, 2026
6	Central Innovation	Partial evidence	Pymble, AustraliaHQ checked Sep 28, 2026	51-200	115 contacts →
	Partial evidence “Central Innovation sources, builds and advises on world-class design process solutions to the manufacturing, architecture, engineering and construction industries.” Source: RevenueBase Database · checked Sep 28, 2026
7	ASTC	Indirect evidence	Adelaide, AustraliaHQ checked Sep 28, 2026	51-200	106 contacts →
	Indirect evidence “The Australian Semiconductor Technology Company (ASTC Pty Ltd) delivers hardware and software development services and solutions to global electronics companies.” Source: RevenueBase Database · checked Sep 28, 2026
8	TMK Consulting Engineers	Partial evidence	Adelaide, AustraliaHQ checked Sep 28, 2026	51-200	102 contacts →
	Partial evidence “TMK Consulting Engineers success and growth is built on a reputation of delivering broad-based engineering design that is high quality, technical excellence, reliable and building…” Source: RevenueBase Database · checked Sep 28, 2026
9	Products For Industry PFI	Partial evidence	Brisbane, AustraliaHQ checked Sep 28, 2026	201-500	92 contacts →
	Partial evidence “Products For Industry is a leading design and engineering company.” Source: RevenueBase Database · checked Sep 28, 2026
10	Indesco	Partial evidence	Canberra City, AustraliaHQ checked Sep 28, 2026	51-200	85 contacts →
	Partial evidence “With a rich history spanning four decades, Indesco has firmly established itself as a premier engineering consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
11	AMOG	Indirect evidence	Glen Waverley, AustraliaHQ checked Sep 28, 2026	51-200	80 contacts →
	Indirect evidence “Expertise.” Source: RevenueBase Database · checked Sep 28, 2026
12	Pitch Black Group	Partial evidence	Brisbane, AustraliaHQ checked Sep 28, 2026	51-200	76 contacts →
	Partial evidence “Pitch Black Group is an Australian professional engineering and project services consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
13	Invenio Pty. LTD	Indirect evidence	Box Hill, AustraliaHQ checked Sep 28, 2026	201-500	73 contacts →
	Indirect evidence “Invenio is a pioneering business solutions provider with strengths in Business Services, Collaborative Innovation and Specialist Recruitment.” Source: RevenueBase Database · checked Sep 28, 2026
14	Bligh Tanner	Partial evidence	Fortitude Valley, AustraliaHQ checked Sep 28, 2026	51-200	69 contacts →
	Partial evidence “With offices in Brisbane and Sydney, Bligh Tanner is a structural, façade, civil, environmental and water engineering consultancy distinguished by its high level of expertise…” Source: RevenueBase Database · checked Sep 28, 2026
15	Cell Engineering	Partial evidence	Mackay, AustraliaHQ checked Sep 28, 2026	51-200	69 contacts →
	Partial evidence “Cell Engineering was established in 2005 and has become a major engineering consultant for the specialist areas involved in coal mining and infrastructure development.” Source: RevenueBase Database · checked Sep 28, 2026
16	L R Consulting	Indirect evidence	Newstead, AustraliaHQ checked Sep 28, 2026	51-200	67 contacts →
	Indirect evidence “L+R (formerly Lambert & Rehbein) offers a complete professional consulting service from inception to implementation.” Source: RevenueBase Database · checked Sep 28, 2026
17	Witthoft Engineering	Partial evidence	Fortitude Valley, AustraliaHQ checked Sep 28, 2026	51-200	65 contacts →
	Partial evidence “Witthoft Engineering Pty Ltd is an engineering consultancy company based in Brisbane, Australia, which specialises in electrical, instrumentation, industrial control system…” Source: RevenueBase Database · checked Sep 28, 2026
18	Bornhorst Ward	Indirect evidence	Brisbane, AustraliaHQ checked Sep 28, 2026	51-200	63 contacts →
	Indirect evidence “Civil and Structural Consulting Engineers Bornhorst + Ward combine 50 years business experience, innovative design, advanced technology, cunting edge solutions, quality and…” Source: RevenueBase Database · checked Sep 28, 2026
19	Adams Consulting Engineers PTY LTD	Indirect evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	51-200	63 contacts →
	Indirect evidence “Adams Consulting Engineers began in Melbourne in 1991, with a small team of talented structural and civil consulting engineers.” Source: RevenueBase Database · checked Sep 28, 2026
20	D I IS NOW Capgemini	Partial evidence	Rozelle, AustraliaHQ checked Sep 28, 2026	51-200	56 contacts →
	Partial evidence “D+I is now Capgemini \| Product design and engineering solutions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Agilitus QLD	Partial evidence	Brisbane, AustraliaHQ checked Sep 28, 2026	51-200	55 contacts →
	Partial evidence “Agilitus QLD’s mission is to be the most reliable, value-focused engineering service provider in the resource and industrial sectors.” Source: RevenueBase Database · checked Sep 28, 2026
22	SME Powered Services	Indirect evidence	Port Melbourne, AustraliaHQ checked Sep 28, 2026	201-500	54 contacts →
	Indirect evidence “At SME Powered Services, we specialise in providing our clients access to a highly skilled team ready to collaborate on your next project.” Source: RevenueBase Database · checked Sep 28, 2026
23	Soto Consulting Engineers	Partial evidence	Illawarra, AustraliaHQ checked Sep 28, 2026	11-50	52 contacts →
	Partial evidence “For over 26 years, Soto Engineering has been at the forefront of Structural, Mechanical, Pipework, and Refractory Engineering, delivering innovative and highly reliable solutions…” Source: RevenueBase Database · checked Sep 28, 2026
24	Ampec Technologies	Indirect evidence	Sydney, AustraliaHQ checked Sep 28, 2026	51-200	50 contacts →
	Indirect evidence “Partnering with us is good business.” Source: RevenueBase Database · checked Sep 28, 2026
25	WML Consultants PTY LTD	Indirect evidence	Bunbury, AustraliaHQ checked Sep 28, 2026	51-200	40 contacts →
	Indirect evidence “For more than 28 years, WML Consultants have engineered solutions for clients within and beyond Western Australia.” 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: engineering outsourcing 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 engineering outsourcing firms.
Partial evidence: Its own public description names part of engineering outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering outsourcing 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 852 engineering outsourcing firms based in Australia

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Engineering outsourcing firms based in Australia at a glance

As of Sep 28, 2026

46.2%Verified-email coverage

9.2Average contacts per company

1-10Median size (employees)

8.2%Largest-city concentration · Melbourne

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

537

11-50

236

51-200

201-500

501-1,000

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 852 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 engineering outsourcing 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 “engineering outsourcing 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 engineering outsourcing 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 engineering outsourcing 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, 3,618 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.

Engineering outsourcing 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 engineering outsourcing 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 engineering outsourcing firms are there based in Australia?

RevenueBase identified 852 engineering outsourcing 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?

TTW, headquartered in North Sydney, tops this list with the largest team on record.

Which city has the most engineering outsourcing firms?

Melbourne leads with 70 headquartered companies, followed by Sydney (68) and Brisbane (65).

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 3,618 verified decision-maker contacts tracked across these 852 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.