# 50 leading consulting firms in Australia

Tamtam tracks 210 consulting firms headquartered in Australia. This list ranks the 50 largest by number of employees on LinkedIn, led by Worley, GHD and KPMG Australia. Their median headcount is 1,431. Half of them were founded in 1991 or later. The most common headquarters are Sydney (15), Melbourne (7) and North Sydney (3).

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.

🇦🇺 Australia · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Worley](https://www.tamtam.ai/c/worley) (worley.com)<br>Global professional services company specializing in energy, chemicals, and resources, providing integrated solutions for project delivery and asset management | Professional Services | 🇦🇺 Sydney | 37,425 |  |
| 2 | [GHD](https://www.tamtam.ai/c/ghd) (ghd.com)<br>A global network of professionals providing integrated solutions in water, energy, and communities through engineering, environmental, design, and construction expertise | Civil Engineering | 🇦🇺 Sydney | 17,363 | 1928 |
| 3 | [KPMG Australia](https://www.tamtam.ai/c/kpmg-australia) (kpmg.com.au)<br>Professional services firm offering audit, tax, legal, management consulting, and digital solutions to diverse industries and sectors in Australia. | Business Consulting and Services | 🇦🇺 Sydney | 9,429 |  |
| 4 | [Aurecon](https://www.tamtam.ai/c/aurecon) (aurecongroup.com)<br>Design, engineering, and advisory company focusing on creating a better future through innovative solutions across various markets and asset types | Engineering Services | 🇦🇺 Docklands | 8,800 | 2009 |
| 5 | [Deloitte Australia](https://www.tamtam.ai/c/deloitte-australia) (deloitte.com.au)<br>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 | Management Consulting | 🇦🇺 Sydney | 7,674 |  |
| 6 | [SMEC (an SJ Group company)](https://www.tamtam.ai/c/smec-an-sj-group-company) (smec.com)<br>Global engineering consultancy specializing in urban development, infrastructure, and management services Providing design leadership and advisory services across various sectors | Engineering Services | 🇦🇺 North Sydney | 7,311 | 1970 |
| 7 | [MNC](https://www.tamtam.ai/c/mnc-barangaroo) (mnca.com.au)<br>The company specializes in solving insurance, reinsurance, superannuation, and risk-related problems through tailored consulting services by experienced professionals | Insurance | 🇦🇺 Barangaroo | 6,235 | 2010 |
| 8 | [PwC Australia](https://www.tamtam.ai/c/pwc-australia) (pwc.com.au)<br>Professional services focused on building trust in society and solving important problems through insights and expertise from people. | Business Consulting and Services | 🇦🇺 Sydney | 5,636 |  |
| 9 | [Probe CX](https://www.tamtam.ai/c/probe-cx) (probecx.com)<br>Probe CX partners with businesses to create modern digital organizations, delivering exceptional customer experiences through technology, people, process, and data | Outsourcing and Offshoring Consulting | 🇦🇺 Melbourne | 4,600 | 1979 |
| 10 | [WSP in Australia](https://www.tamtam.ai/c/wsp-in-australia) (wsp.com)<br>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 | Professional Services | 🇦🇺 Sydney | 4,487 |  |
| 11 | [Ausenco](https://www.tamtam.ai/c/ausenco) (ausenco.com)<br>A global company offering sustainable solutions for minerals, metals, and industrial sectors through consulting, engineering, project delivery, and asset optimization | Professional Services | 🇦🇺 South Brisbane | 4,227 | 1991 |
| 12 | [Rider Levett Bucknall RLB](https://www.tamtam.ai/c/rider-levett-bucknall-rlb) (rlb.com)<br>Specialists in cost management, quantity surveying, project management, and sustainability services for landmark and ambitious construction projects worldwide. | Construction | 🇦🇺 | 3,622 |  |
| 13 | [MinterEllison](https://www.tamtam.ai/c/minterellison) (minterellison.com)<br>Provides comprehensive legal and consulting services, solving complex problems with a heritage of excellence and strong client relationships. | Law Practice | 🇦🇺 Australia | 2,758 | 1827 |
| 14 | [BDO in Australia](https://www.tamtam.ai/c/bdo-in-australia) (bdo.com.au)<br>Providing audit, tax, and advisory services to diverse clients including corporations, private businesses, entrepreneurs, and individuals across industries. | Accounting | 🇦🇺 Brisbane | 2,590 |  |
| 15 | [FUJIFILM Business Innovation Australia](https://www.tamtam.ai/c/fujifilm-business-innovation-australia) (fujifilm.com)<br>We offer document technology, services, software, and supplies to help businesses work smarter, streamline processes, and leverage paper and electronic media for success | IT Services and IT Consulting | 🇦🇺 Macquarie Park | 2,533 |  |
| 16 | [180 Degrees Consulting](https://www.tamtam.ai/c/180-degrees-consulting) (180dc.org)<br>Global youth-led consultancy for non-profits, governments, and social-conscious organizations, providing consulting services to improve education, reduce homelessness, and alleviate poverty. | Non-profit Organizations | 🇦🇺 Sydney | 2,365 | 2007 |
| 17 | [Tetra Tech Coffey](https://www.tamtam.ai/c/tetra-tech-coffey) (tetratechcoffey.com)<br>Leading provider of engineering and consulting services, specializing in environmental, geotechnical, and project management Extensive expertise for complex projects worldwide | Business Consulting and Services | 🇦🇺 Chatswood | 2,362 |  |
| 18 | [Accenture Australia](https://www.tamtam.ai/c/accenture-australia) (accenture.com)<br>Global professional services company focused on digital transformation, operations optimization, revenue growth, and citizen services with a strong technology-driven approach | IT Services and IT Consulting | 🇦🇺 Melbourne VIC | 2,305 | 1989 |
| 19 | [TSA Group - Australia](https://www.tamtam.ai/c/tsa-group-australia) (tsagroup.com.au)<br>Specializing in CX consultancy and services, we revolutionize brand interactions with Australians through local expertise, advanced technology, and dedicated teams | Outsourcing and Offshoring Consulting | 🇦🇺 West Perth | 2,198 | 1997 |
| 20 | [Findex](https://www.tamtam.ai/c/findex) (findex.com.au)<br>Provider of integrated financial advisory and accounting services across Australia and New Zealand, focusing on holistic, technology-driven client solutions. | Financial Services | 🇦🇺 Melbourne | 2,004 | 1987 |
| 21 | [Planit](https://www.tamtam.ai/c/planit) (planit.com)<br>Global leader in quality engineering and assurance solutions, empowering businesses to enhance software quality and delivery processes through continuous growth and excellence | IT Services and IT Consulting | 🇦🇺 Sydney | 1,931 | 1997 |
| 22 | [SMK](https://www.tamtam.ai/c/smk-melbourne) (smk.co)<br>Global EdTech specializing in marketing capability transformation, offering online and in-person learning experiences in various digital marketing subjects for brands and organizations worldwide | Education | 🇦🇺 Melbourne | 1,904 | 2010 |
| 23 | [RSM Australia](https://www.tamtam.ai/c/rsm-australia) (rsm.global)<br>A member of a global network providing assurance, tax, and consulting services with a client-centric approach and deep understanding of businesses | Accounting | 🇦🇺 Perth | 1,841 | 1922 |
| 24 | [Grant Thornton Australia](https://www.tamtam.ai/c/grant-thornton-australia) (grantthornton.com.au)<br>Experienced professionals providing audit, assurance, tax, and advisory services with a focus on client care and principled execution. | Accounting | 🇦🇺 Sydney | 1,739 |  |
| 25 | [CyberCX](https://www.tamtam.ai/c/cybercx)<br>Provides comprehensive cybersecurity services including consulting, incident response, security testing, and managed solutions to organizations across various sectors, ensuring digital resilience. | Computer and Network Security | 🇦🇺 Melbourne | 1,431 | 2019 |
| 26 | [Data#3](https://www.tamtam.ai/c/data-3) (data3.com)<br>A technology solutions provider with a focus on cloud, security, data analytics, and managed services, committed to a sustainable future | IT Services and IT Consulting | 🇦🇺 Toowong | 1,413 | 1977 |
| 27 | [Advisian](https://www.tamtam.ai/c/advisian) (advisian.com)<br>Advisian provides comprehensive consulting services to solve resource, energy, and infrastructure challenges worldwide, delivering strategic, practical, and commercially oriented solutions | Business Consulting and Services | 🇦🇺 North Sydney | 1,360 |  |
| 28 | [Lycopodium](https://www.tamtam.ai/c/lycopodium) (lycopodium.com)<br>Australian engineering consultancy specializing in project management across various industries, prioritizing client objectives, quality services, and growth through organic expansion and strategic acquisitions | Professional Services | 🇦🇺 Perth | 1,239 | 1992 |
| 29 | [Cardno](https://www.tamtam.ai/c/cardno) (stantec.com)<br>A company has rebranded to Stantec Follow the Stantec page for updates | Design Services | 🇦🇺 Fortitude Valley | 1,155 |  |
| 30 | [Urbis](https://www.tamtam.ai/c/urbis) (urbis.com.au)<br>Urban development consultancy providing expertise in planning, design, policy, heritage, valuations, transactions, economics, and research for better city and community outcomes | Business Consulting and Services | 🇦🇺 Melbourne | 1,139 | 1963 |
| 31 | [VBP](https://www.tamtam.ai/c/vbp) (vbp.au)<br>Our focus is on fostering long-term success through strategic partnerships and support | Financial Services | 🇦🇺 Sydney | 1,136 | 2013 |
| 32 | [Stellar](https://www.tamtam.ai/c/stellar-north-sydney) (probecx.com)<br>A global customer experience management organization specializing in contact center outsourcing, CX consulting, automation, analytics, and co-innovation with clients | Outsourcing and Offshoring Consulting | 🇦🇺 North Sydney | 1,118 |  |
| 33 | [UBT](https://www.tamtam.ai/c/ubt) (universalbusinessteam.com)<br>Global consulting organization supporting family businesses with business advisory, coaching, and training programs, while also providing support to education, charity, and disaster relief initiatives | Business Consulting and Services | 🇦🇺 Sydney | 1,079 |  |
| 34 | [Atturra](https://www.tamtam.ai/c/atturra) (atturra.com)<br>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 | IT Services and IT Consulting | 🇦🇺 Sydney | 1,049 |  |
| 35 | [Attra, a Synechron Company](https://www.tamtam.ai/c/attra-a-synechron-company) (synechron.com)<br>A global technology services provider specializing in payments with over 25 years of experience, offering consulting, application management, and quality engineering services | IT Services and IT Consulting | 🇦🇺 Box Hill | 984 | 1995 |
| 36 | [Robert Bird Group](https://www.tamtam.ai/c/robert-bird-group) (robertbird.com)<br>Provides structural, civil, and construction engineering consultancy services, creating value for clients through innovative application of engineering science and planning for construction. | Construction | 🇦🇺 Brisbane | 912 | 1982 |
| 37 | [BG&E](https://www.tamtam.ai/c/bg-and-e) (bgeeng.com)<br>Design and deliver engineering solutions across property, transport, water, defence, renewables, and resources sectors with technical expertise and innovation. | Engineering Services | 🇦🇺 Millers Point | 903 | 1970 |
| 38 | [ED Qld](https://www.tamtam.ai/c/ed-qld)<br>Specializing in fostering economic growth and sustainability through collaborations with local government and private entities | Business Consulting and Services | 🇦🇺 Toowoomba | 846 |  |
| 39 | [NRI Australia & New Zealand](https://www.tamtam.ai/c/nri-australia-and-new-zealand) (nri-anz.com)<br>Provider of transformative digital solutions through strategy, consulting, infrastructure, and managed IT services, with global reach and a passionate, customer-focused team | IT Services and IT Consulting | 🇦🇺 Sydney | 846 | 1965 |
| 40 | [Calibre](https://www.tamtam.ai/c/calibre) (wsp.com)<br>A global engineering firm offering design, engineering, advisory, and environmental services with expertise in EPCM project delivery and major capital projects | Mining | 🇦🇺 Perth | 834 | 1993 |
| 41 | [Primero](https://www.tamtam.ai/c/primero) (primero.com.au)<br>A multidisciplinary engineering group specializing in design, construction, and operation of global resource projects, offering turnkey solutions, maintenance services, and BOO solutions | Mining | 🇦🇺 Osborne Park | 821 | 2011 |
| 42 | [Scyne Advisory](https://www.tamtam.ai/c/scyne-advisory) (scyne.com.au)<br>Provides independent advisory services to support public sector projects and governments in Australia, focusing on resilience, security, equity, and prosperity | Business Consulting and Services | 🇦🇺 Canberra | 807 | 2023 |
| 43 | [Mantel](https://www.tamtam.ai/c/mantel) (mantelgroup.com.au)<br>Next-gen consultancy specializing in AI, data, digital, security, and cloud solutions to transform business operations with a people-focused culture. | IT Services and IT Consulting | 🇦🇺 Melbourne | 786 |  |
| 44 | [EY Analytics (Asia-Pacific)](https://www.tamtam.ai/c/ey-analytics-asia-pacific) (ey.com)<br>Specializing in data and advanced analytics, we help organizations implement strategies to optimize growth, protect assets, and improve business outcomes | IT Services and IT Consulting | 🇦🇺 Melbourne | 780 | 2006 |
| 45 | [SAGE Group](https://www.tamtam.ai/c/sage-group) (gotosage.com)<br>Specialist industrial services provider leveraging digitalization to innovate, modernize, and improve operations for global organizations through automation, consulting, training, and engineering expertise | Automation Machinery Manufacturing | 🇦🇺 Adelaide | 764 |  |
| 46 | [Nexon Asia Pacific](https://www.tamtam.ai/c/nexon-asia-pacific) (nexon.com.au)<br>An award-winning digital consulting partner offering end-to-end solutions in security, cloud, and digital services to mid-market, enterprise, and government organizations | IT Services and IT Consulting | 🇦🇺 Sydney | 726 |  |
| 47 | [Nova Systems](https://www.tamtam.ai/c/nova-systems) (novasystems.com)<br>Design, integration, and delivery of complex programs for Defence, emergency services, and civil applications with deep operational understanding. | Engineering Services | 🇦🇺 Adelaide | 695 | 1999 |
| 48 | [RPS Australia Asia Pacific](https://www.tamtam.ai/c/rps-australia-asia-pacific) (rpsgroup.com)<br>Global professional services provider with 5,000 consultants operating in 125 countries, offering services in sectors such as energy, transport, water, and more | Management Consulting | 🇦🇺 Fortitude Valley | 686 | 1970 |
| 49 | [NDY](https://www.tamtam.ai/c/ndy) (ndy.com)<br>The company focuses on delivering successful outcomes for challenging projects by fostering client relationships based on trust, collaboration, and innovation | Engineering Services | 🇦🇺 Melbourne | 680 | 1972 |
| 50 | [APP Corporation](https://www.tamtam.ai/c/app-corporation) (app.com.au)<br>Consultancy services in property and infrastructure, offering project management, advisory, risk management, and real estate services across Australia. | Business Consulting and Services | 🇦🇺 Sydney | 677 | 1989 |

## 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](https://www.tamtam.ai/l/largest-companies-australia) (5,556)
- [Multinational companies in Australia](https://www.tamtam.ai/l/multinational-companies-australia) (1,184)
- [Retail chains in Australia](https://www.tamtam.ai/l/retail-chains-australia) (577)
- [Financial services firms in Australia](https://www.tamtam.ai/l/financial-services-firms-australia) (483)
- [Critical infrastructure operators in Australia](https://www.tamtam.ai/l/critical-infrastructure-operators-australia) (450)
- [Education providers in Australia](https://www.tamtam.ai/l/education-companies-australia) (402)
- [Healthcare providers in Australia](https://www.tamtam.ai/l/healthcare-providers-australia) (397)
- [Professional services firms in Australia](https://www.tamtam.ai/l/professional-services-firms-australia) (377)
- [Financial Services companies in Australia](https://www.tamtam.ai/l/financial-services-companies-australia) (373)
- [Government Administration companies in Australia](https://www.tamtam.ai/l/government-administration-companies-australia) (351)
- [Public sector organisations in Australia](https://www.tamtam.ai/l/public-sector-organisations-australia) (326)
- [Manufacturers in Australia](https://www.tamtam.ai/l/manufacturers-australia) (320)
- [Companies with a mobile app in Australia](https://www.tamtam.ai/l/companies-with-mobile-app-australia) (305)
- [Publicly traded companies in Australia](https://www.tamtam.ai/l/publicly-traded-companies-australia) (299)
- [Hospitals and Health Care companies in Australia](https://www.tamtam.ai/l/hospitals-and-health-care-companies-australia) (297)
- [Corporate groups and holding companies in Australia](https://www.tamtam.ai/l/holding-companies-australia) (280)
- [E-commerce companies in Australia](https://www.tamtam.ai/l/ecommerce-companies-australia) (247)
- [Retail companies in Australia](https://www.tamtam.ai/l/retail-companies-australia) (243)
- [Companies with in-house R&D in Australia](https://www.tamtam.ai/l/r-and-d-companies-australia) (235)
- [IT Services and IT Consulting companies in Australia](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-australia) (215)
- [Non-profit Organizations companies in Australia](https://www.tamtam.ai/l/non-profit-organizations-companies-australia) (190)
- [Hotel and hospitality groups in Australia](https://www.tamtam.ai/l/hospitality-groups-australia) (188)
- [Construction companies in Australia](https://www.tamtam.ai/l/construction-companies-australia) (186)
- [SaaS companies in Australia](https://www.tamtam.ai/l/saas-companies-australia) (186)

## The same list elsewhere in Australia

- [Consulting firms in New South Wales](https://www.tamtam.ai/l/consulting-firms-new-south-wales) (73)
- [Consulting firms in Victoria](https://www.tamtam.ai/l/consulting-firms-victoria) (69)
- [Consulting firms in Sydney](https://www.tamtam.ai/l/consulting-firms-sydney) (47)
- [Consulting firms in Melbourne](https://www.tamtam.ai/l/consulting-firms-melbourne) (45)

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Source: https://www.tamtam.ai/l/consulting-firms-australia