This selection of large consulting firms in Australia includes global professional services companies like Worley, specializing in energy and resources, and GHD, which provides integrated solutions in water, energy, and communities. Other prominent firms include KPMG Australia, offering audit and tax services, and Aurecon, a design and engineering advisory company. These firms represent a broad spectrum of consulting services, from engineering and environmental solutions to business consulting and IT services.
The data shows a concentration of headquarters in Sydney, with companies like Deloitte Australia, PwC Australia, and WSP in Australia based there. The list also features firms such as SMEC, an engineering consultancy focused on urban development, and Probe CX, which specializes in outsourcing and offshoring consulting. MinterEllison provides legal and consulting services, while BDO in Australia offers audit, tax, and advisory services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Worleyworley.com
Global professional services company specializing in energy, chemicals, and resources, providing integrated solutions for project delivery and asset management |
37,425 | |||
| 2 | 17,363 | ||||
| 3 |
KPMG Australiakpmg.com.au
Professional services firm offering audit, tax, legal, management consulting, and digital solutions to diverse industries and sectors in Australia. |
9,429 | |||
| 4 |
Aureconaurecongroup.com
Design, engineering, and advisory company focusing on creating a better future through innovative solutions across various markets and asset types |
8,800 | |||
| 5 |
Deloitte Australiadeloitte.com.au
A forward-thinking professional services firm focused on cyber security, virtual reality, digital marketing, and tech integration across various industries, aiming to make a meaningful impact |
7,674 | |||
| 6 |
SMEC (an SJ Group company)smec.com
Global engineering consultancy specializing in urban development, infrastructure, and management services Providing design leadership and advisory services across various sectors |
7,311 | |||
| 7 |
MNCmnca.com.au
The company specializes in solving insurance, reinsurance, superannuation, and risk-related problems through tailored consulting services by experienced professionals |
6,235 | |||
| 8 |
PwC Australiapwc.com.au
Professional services focused on building trust in society and solving important problems through insights and expertise from people. |
5,636 | |||
| 9 |
Probe CXprobecx.com
Probe CX partners with businesses to create modern digital organizations, delivering exceptional customer experiences through technology, people, process, and data |
4,600 | |||
| 10 |
WSP in Australiawsp.com
A leading professional services consulting firm providing technical expertise and strategic advice in various sectors, designing lasting solutions for future generations with integrated digital innovations |
4,487 | |||
| 11 |
Ausencoausenco.com
A global company offering sustainable solutions for minerals, metals, and industrial sectors through consulting, engineering, project delivery, and asset optimization |
4,227 | |||
| 12 |
Rider Levett Bucknall RLBrlb.com
Specialists in cost management, quantity surveying, project management, and sustainability services for landmark and ambitious construction projects worldwide. |
3,622 | |||
| 13 |
MinterEllisonminterellison.com
Provides comprehensive legal and consulting services, solving complex problems with a heritage of excellence and strong client relationships. |
2,758 | |||
| 14 |
BDO in Australiabdo.com.au
Providing audit, tax, and advisory services to diverse clients including corporations, private businesses, entrepreneurs, and individuals across industries. |
2,590 | |||
| 15 |
FUJIFILM Business Innovation Australiafujifilm.com
We offer document technology, services, software, and supplies to help businesses work smarter, streamline processes, and leverage paper and electronic media for success |
2,533 | |||
| 16 |
180 Degrees Consulting180dc.org
Global youth-led consultancy for non-profits, governments, and social-conscious organizations, providing consulting services to improve education, reduce homelessness, and alleviate poverty. |
2,365 | |||
| 17 |
Tetra Tech Coffeytetratechcoffey.com
Leading provider of engineering and consulting services, specializing in environmental, geotechnical, and project management Extensive expertise for complex projects worldwide |
2,362 | |||
| 18 |
Accenture Australiaaccenture.com
Global professional services company focused on digital transformation, operations optimization, revenue growth, and citizen services with a strong technology-driven approach |
2,305 | |||
| 19 |
TSA Group - Australiatsagroup.com.au
Specializing in CX consultancy and services, we revolutionize brand interactions with Australians through local expertise, advanced technology, and dedicated teams |
2,198 | |||
| 20 |
Findexfindex.com.au
Provider of integrated financial advisory and accounting services across Australia and New Zealand, focusing on holistic, technology-driven client solutions. |
2,004 | |||
| 21 |
Planitplanit.com
Global leader in quality engineering and assurance solutions, empowering businesses to enhance software quality and delivery processes through continuous growth and excellence |
1,931 | |||
| 22 | 1,904 | ||||
| 23 |
RSM Australiarsm.global
A member of a global network providing assurance, tax, and consulting services with a client-centric approach and deep understanding of businesses |
1,841 | |||
| 24 |
Grant Thornton Australiagrantthornton.com.au
Experienced professionals providing audit, assurance, tax, and advisory services with a focus on client care and principled execution. |
1,739 | |||
| 25 |
CyberCX
Provides comprehensive cybersecurity services including consulting, incident response, security testing, and managed solutions to organizations across various sectors, ensuring digital resilience. |
1,431 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 | 1,413 | ||||
| 27 |
Advisianadvisian.com
Advisian provides comprehensive consulting services to solve resource, energy, and infrastructure challenges worldwide, delivering strategic, practical, and commercially oriented solutions |
1,360 | |||
| 28 |
Lycopodiumlycopodium.com
Australian engineering consultancy specializing in project management across various industries, prioritizing client objectives, quality services, and growth through organic expansion and strategic acquisitions |
1,239 | |||
| 29 | 1,155 | ||||
| 30 |
Urbisurbis.com.au
Urban development consultancy providing expertise in planning, design, policy, heritage, valuations, transactions, economics, and research for better city and community outcomes |
1,139 | |||
| 31 | 1,136 | ||||
| 32 |
Stellarprobecx.com
A global customer experience management organization specializing in contact center outsourcing, CX consulting, automation, analytics, and co-innovation with clients |
1,118 | |||
| 33 |
UBTuniversalbusinessteam.com
Global consulting organization supporting family businesses with business advisory, coaching, and training programs, while also providing support to education, charity, and disaster relief initiatives |
1,079 | |||
| 34 |
Atturraatturra.com
An Australian-based advisory and IT solutions provider offering end-to-end transformation services, including advisory, cloud services, data integration, and managed services, to clients worldwide |
1,049 | |||
| 35 |
Attra, a Synechron Companysynechron.com
A global technology services provider specializing in payments with over 25 years of experience, offering consulting, application management, and quality engineering services |
984 | |||
| 36 |
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 | |||
| 37 |
BG&Ebgeeng.com
Design and deliver engineering solutions across property, transport, water, defence, renewables, and resources sectors with technical expertise and innovation. |
903 | |||
| 38 |
ED Qld
Specializing in fostering economic growth and sustainability through collaborations with local government and private entities |
846 | |||
| 39 |
NRI Australia & New Zealandnri-anz.com
Provider of transformative digital solutions through strategy, consulting, infrastructure, and managed IT services, with global reach and a passionate, customer-focused team |
846 | |||
| 40 | 834 | ||||
| 41 |
Primeroprimero.com.au
A multidisciplinary engineering group specializing in design, construction, and operation of global resource projects, offering turnkey solutions, maintenance services, and BOO solutions |
821 | |||
| 42 |
Scyne Advisoryscyne.com.au
Provides independent advisory services to support public sector projects and governments in Australia, focusing on resilience, security, equity, and prosperity |
807 | |||
| 43 |
Mantelmantelgroup.com.au
Next-gen consultancy specializing in AI, data, digital, security, and cloud solutions to transform business operations with a people-focused culture. |
786 | |||
| 44 |
EY Analytics (Asia-Pacific)ey.com
Specializing in data and advanced analytics, we help organizations implement strategies to optimize growth, protect assets, and improve business outcomes |
780 | |||
| 45 |
SAGE Groupgotosage.com
Specialist industrial services provider leveraging digitalization to innovate, modernize, and improve operations for global organizations through automation, consulting, training, and engineering expertise |
764 | |||
| 46 |
Nexon Asia Pacificnexon.com.au
An award-winning digital consulting partner offering end-to-end solutions in security, cloud, and digital services to mid-market, enterprise, and government organizations |
726 | |||
| 47 |
Nova Systemsnovasystems.com
Design, integration, and delivery of complex programs for Defence, emergency services, and civil applications with deep operational understanding. |
695 | |||
| 48 |
RPS Australia Asia Pacificrpsgroup.com
Global professional services provider with 5,000 consultants operating in 125 countries, offering services in sectors such as energy, transport, water, and more |
686 | |||
| 49 | 680 | ||||
| 50 |
APP Corporationapp.com.au
Consultancy services in property and infrastructure, offering project management, advisory, risk management, and real estate services across Australia. |
677 | |||
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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 Nov 11, 2026.
More company lists in Australia
- The largest companies in Australia 5,556
- Multinational companies in Australia 1,184
- Retail chains in Australia 577
- Financial services firms in Australia 483
- Critical infrastructure operators in Australia 450
- Education providers in Australia 402
- Healthcare providers in Australia 397
- Professional services firms in Australia 377
- Financial Services companies in Australia 373
- Government Administration companies in Australia 351
- Public sector organisations in Australia 326
- Manufacturers in Australia 320
- Companies with a mobile app in Australia 305
- Publicly traded companies in Australia 299
- Hospitals and Health Care companies in Australia 297
- Corporate groups and holding companies in Australia 280
- E-commerce companies in Australia 247
- Retail companies in Australia 243
- Companies with in-house R&D in Australia 235
- IT Services and IT Consulting companies in Australia 215
- Non-profit Organizations companies in Australia 190
- Hotel and hospitality groups in Australia 188
- Construction companies in Australia 186
- SaaS companies in Australia 186