| # | Company | Employees |
|---|---|---|
| 1 |
Monadelphousmonadelphous.com.au
An ASX-200 engineering group in Australia, providing construction, maintenance, and industrial services to the resources, energy, and infrastructure sectors |
5,712 |
| 2 |
SRG Globalsrgglobal.com.au
A diversified industrial services provider offering asset maintenance, mining services, engineering, and construction solutions to solve complex problems in major industries |
2,514 |
| 3 |
Cloughcloughgroup.com
A pioneering project delivery organization that delivers high performing assets for energy, resources, and infrastructure industries with a focus on innovation and sustainability |
1,855 |
| 4 |
KAEFER Australiakaefer.com.au
A leading provider of construction, maintenance, and industrial services in Australia with a focus on mechanical, surface protection, insulation, and electrical services |
1,371 |
| 5 |
GenusPlus Groupgenus.com.au
Designs, constructs, maintains critical power and communications infrastructure across Australia, including transmission, substations, renewables, and communication solutions, supporting national development and progress. |
1,276 |
| 6 |
AusGroup - AGC | MASaltrad.com.au
An experienced project and asset services provider offering fabrication, construction, maintenance, scaffolding, industrial coatings, and specialty services to various industries |
1,202 |
| 7 |
Robert Bird Grouprobertbird.com
Provides structural, civil, and construction engineering consultancy services, creating value for clients through innovative application of engineering science and planning for construction. |
912 |
| 8 |
Duratecduratec.com.au
Specializing in steel and concrete protection and remediation, offering cost-effective solutions to extend asset life through innovative programs and methodologies |
873 |
| 9 |
ECMecm.com.au
A Western Australia-based company part of GenusPlus Group, offering E&I, fabrication, maintenance, and services to mining, oil and gas, infrastructure, and power generation sectors |
798 |
| 10 |
Five Group Pty Ltdthefivegroup.com.au
A group of engineering, surveying, and architectural drafting companies operating in Australia and South East Asia with subsidiaries in various specialized areas |
642 |
| 11 |
Ertechertech.com.au
Australian employee-owned company building and renewing infrastructure in urban, regional, and remote Australia. Expertise in Defence, Resources, Transport, and Infrastructure sectors. |
546 |
| 12 |
SCEE Electricalsceeelectrical.com.au
A national provider of electrical services to resources and infrastructure sectors, offering maintenance, instrumentation, communication, and smart energy solutions with proven expertise |
544 |
| 13 |
DECMILdecmil.com
The company offers integrated construction and engineering solutions in key market sectors, operating in Australia with offices in Perth, Brisbane, and Melbourne |
467 |
| 14 |
FIRM Construction Pty Ltd.firmconstruction.com.au
Leading commercial construction and refurbishment contractor in Western Australia, delivering client-oriented projects that transform the community's cultural landscape |
357 |
| 15 |
JWH Groupjwhgroup.com.au
A leading residential building group in Western Australia, offering a range of homes from affordable to luxury for various lifestyles and locations |
335 |
| 16 |
Summit Homes Groupsummithomes.com.au
Leading Western Australian construction, property, and finance business offering tailored home building journeys with a focus on people and over 40 years of experience |
319 |
| 17 |
Scho Homes (SchoHomes)
Perth home builders ensuring attention to detail, care, and professionalism to deliver flawless dream homes with a focus on client needs and feedback |
317 |
| 18 |
UGL Kentz Joint Ventureuglkentz.com.au
Provider of structural, mechanical, and piping construction services for LNG facilities, offering job opportunities and expertise for pre-commissioning and commissioning |
223 |
| 19 |
PARC Engineering Pty Ltdparcengineering.com.au
Provides comprehensive engineering and project management solutions to clients in Australian resources, energy, and infrastructure sectors, including civil, mechanical, electrical, and inspection services. |
188 |
| 20 |
LD Totalldtotal.com.au
Industry-leading and award-winning landscaping company offering end-to-end services to commercial clients across Australia, with a focus on quality, reliability, and lasting partnerships |
183 |
| 21 |
Scott Park Group Pty Ltdscottparkgroup.com.au
Residential building industry leader in Western Australia, known for commitment to customer service and quality homes Brands include Redink Homes and B1 Homes |
183 |
| 22 |
DTMT Construction - Australiadtmt.com.au
A family-owned construction business established in 1982, specializing in civil works across Australia, particularly in remote areas They offer integrated services and prioritize safety |
181 |
| 23 |
Alltype Engineeringalltypeengineering.com.au
A company providing fabrication, installation, construction, and maintenance services for various industries, with expertise in high pressure pipework, structural steel, and modular equipment |
168 |
| 24 |
Catalpa Groupcatalpagroup.com.au
A leading civil, concrete, and groundworks company in Australia specializing in construction, energy, pipelines, and communications projects with a focus on quality and safety |
162 |
| 25 |
Kerman Contracting Pty Ltdkerman.com.au
Established in 1981, this company specializes in design and construction of industrial facilities, processing plants, accommodation villages, and bulk storage facilities in Australia |
151 |
| 26 |
Stork Technical Services Australia Pty Ltdenermech.com
A leading contractor in Australia providing a wide range of services for the mining, hydrocarbon, power, and industrial sectors, tailored to customer needs |
146 |
| 27 |
Wood & Grieve Engineers now part of Stanteclinkedin.com
This company's page is no longer active Visit their new page on Stantec to learn more about their services |
86 |
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
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