# List of professional services firms in Australia

Tamtam tracks 377 professional services firms headquartered in Australia. This list ranks the 100 largest by number of employees on LinkedIn, led by Worley, Macquarie Group and GHD. Their median headcount is 1,298. Half of them were founded in 1987 or later. The most common headquarters are Sydney (29), Melbourne (22) and Fortitude Valley (4).

These Australian professional services firms include large global companies and mid-sized firms. Many are headquartered in Sydney, such as Worley, a global professional services company specializing in energy, chemicals, and resources, and Macquarie Group, a global financial services organization. Other notable firms include GHD, offering integrated solutions in water, energy, and communities, and KPMG Australia, a professional services firm providing audit, tax, and consulting.

The companies listed show a strong presence in engineering and consulting. For instance, Aurecon focuses on design, engineering, and advisory, while SMEC specializes in urban development and infrastructure. ALS is a global leader in scientific testing across various sectors. This collection of firms highlights a concentration of expertise in complex project delivery, financial services, and specialized technical consulting.

🇦🇺 Australia · 100 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 | [Macquarie Group](https://www.tamtam.ai/c/macquarie-group) (macquarie.com)<br>Global financial services organization empowering people to innovate and invest for a better future in 34 markets Visit wwwmacquariecom for more information | Financial Services | 🇦🇺 Sydney | 20,757 | 1969 |
| 3 | [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 |
| 4 | [ALS](https://www.tamtam.ai/c/als) (alsglobal.com)<br>Global leader in scientific testing with state-of-the-art technologies, offering comprehensive solutions in environment, food, mining, personal care, pharmaceutical, healthcare, and equipment reliability sectors | International Trade and Development | 🇦🇺 Bowen Hills | 13,323 |  |
| 5 | [SEO](https://www.tamtam.ai/c/seo) (optimising.com.au)<br>A leading SEO agency with over 15 years of experience, offering in-house services for web development, PR, copywriting, and digital marketing | Advertising Services | 🇦🇺 Melbourne | 10,205 | 1999 |
| 6 | [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 |  |
| 7 | [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 |
| 8 | [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 |  |
| 9 | [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 |
| 10 | [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 |
| 11 | [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 |  |
| 12 | [ILS World](https://www.tamtam.ai/c/ils-world) (ils.world)<br>Global provider of independent fiduciary services creating and managing bespoke structures for personal and commercial needs, with offices in various jurisdictions | Financial Services | 🇦🇺 Victoria Road | 5,197 | 1991 |
| 13 | [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 |  |
| 14 | [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 |
| 15 | [TOA Global](https://www.tamtam.ai/c/toa-global) (toaglobal.com)<br>Providing global accounting outsourcing services with elite offshore talent to fill staffing gaps, enhance operational capacity, and save costs for firms | Outsourcing and Offshoring Consulting | 🇦🇺 Southport | 3,820 | 2013 |
| 16 | [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 |  |
| 17 | [NGO Recruitment](https://www.tamtam.ai/c/ngo-recruitment) (ngorecruitment.com)<br>Specialists in not-for-profit sector recruitment with a focus on Australia, Asia Pacific, and international placements Services include executive search, permanent, temporary, and contract recruitment | Staffing and Recruiting | 🇦🇺 Sydney | 3,516 | 2004 |
| 18 | [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 |
| 19 | [X-Team](https://www.tamtam.ai/c/x-team) (x-team.com)<br>Providing vetted, high-performing remote developers to integrate seamlessly with existing teams, enhancing engineering capabilities across diverse industries. | Staffing and Recruiting | 🇦🇺 Chelsea | 2,737 | 2006 |
| 20 | [Hudson](https://www.tamtam.ai/c/hudson-sydney) (au.hudson.com)<br>We specialize in matching individuals with the right roles, providing talent solutions across the employee lifecycle to drive business success and transform lives | Staffing and Recruiting | 🇦🇺 Sydney | 2,664 | 1985 |
| 21 | [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 |  |
| 22 | [EML Group](https://www.tamtam.ai/c/eml-group) (eml.com.au)<br>Specialists in work health and safety, offering tailored injury prevention, claims management, and return-to-work support for businesses and injured workers | Insurance | 🇦🇺 Sydney | 2,474 |  |
| 23 | [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 |  |
| 24 | [Healthcare Australia](https://www.tamtam.ai/c/healthcare-australia) (healthcareaustralia.com.au)<br>A healthcare staffing agency offering solutions to the growing nursing and medical skills shortage, allowing professionals flexibility in their work | Health and Human Services | 🇦🇺 Melbourne | 2,346 |  |
| 25 | [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 |
| 26 | [ANZUK Education Australia](https://www.tamtam.ai/c/anzuk-education-australia) (anzuk.education)<br>A leading education recruitment agency placing educators and support staff in schools and early childhood settings, focusing on making a difference every day | Education Administration Programs | 🇦🇺 Collingwood | 2,210 | 2004 |
| 27 | [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 |
| 28 | [Allens](https://www.tamtam.ai/c/allens) (allens.com.au)<br>An international organization with a rich history of shaping legislation and regulatory frameworks, providing global legal services to clients worldwide | Law Practice | 🇦🇺 Sydney | 2,180 | 1822 |
| 29 | [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 |
| 30 | [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 |
| 31 | [HWLE Lawyers](https://www.tamtam.ai/c/hwle-lawyers) (hwlebsworth.com.au)<br>Providing expert commercial legal services across Australia with high partner involvement, focusing on client outcomes and efficient problem-solving. | Law Practice | 🇦🇺 Melbourne | 1,914 |  |
| 32 | [Clayton Utz](https://www.tamtam.ai/c/clayton-utz) (claytonutz.com)<br>Provides tailored legal advice and services to private sector and government clients across Australia with honesty and entrepreneurial spirit. | Law Practice | 🇦🇺 Sydney | 1,876 | 1833 |
| 33 | [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 |
| 34 | [IPA](https://www.tamtam.ai/c/ipa) (synergieaustralia.com.au)<br>A national recruitment agency in Australia, providing temporary, permanent, and diversity recruitment services while supporting people with disabilities | Staffing and Recruiting | 🇦🇺 Melbourne | 1,838 | 1984 |
| 35 | [WorkPac](https://www.tamtam.ai/c/workpac) (workpac.com)<br>Australia's largest workforce services provider offering tailored recruitment, skills and career development solutions in diverse sectors, emphasizing safety and positive impact | Human Resources Services | 🇦🇺 Fortitude Valley | 1,749 | 1997 |
| 36 | [Befree](https://www.tamtam.ai/c/befree) (befreeltd.com)<br>A provider of F&A BPO services, leveraging industry knowledge, technology, and automation to deliver scalable outsourcing solutions for improved operational efficiency and data security | Outsourcing and Offshoring Consulting | 🇦🇺 Parramatta | 1,743 | 2006 |
| 37 | [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 |  |
| 38 | [Talent](https://www.tamtam.ai/c/talent) (talentinternational.com)<br>Connects experts in technology and transformation with companies. Focuses on building skilled teams and rethinking tech solutions, delivering value through a people-first approach. | Staffing and Recruiting | 🇦🇺 Sydney | 1,608 | 1995 |
| 39 | [AS White Global](https://www.tamtam.ai/c/as-white-global) (aswhiteglobal.com)<br>Specializing in international staffing solutions since 2011, we help Australian companies build highly capable international teams for long-term success | Staffing and Recruiting | 🇦🇺 Sydney | 1,583 | 2011 |
| 40 | [Corrs Chambers Westgarth](https://www.tamtam.ai/c/corrs-chambers-westgarth) (corrs.com.au)<br>Providing comprehensive legal services including major transactions, complex disputes, strategic advice, and international law expertise for global clients. | Law Practice | 🇦🇺 Sydney | 1,582 |  |
| 41 | [Pitcher Partners](https://www.tamtam.ai/c/pitcher-partners) (pitcher.com.au)<br>Accounting, audit, and advisory services focused on middle market businesses, family-owned firms, high net-worth individuals, and public sector clients. | Accounting | 🇦🇺 Docklands | 1,546 | 1991 |
| 42 | [Chandler Macleod](https://www.tamtam.ai/c/chandler-macleod) (chandlermacleod.com)<br>Providing recruitment, staffing, and workforce management services with psychological assessment to help clients select, retain, and develop talent. | Human Resources Services | 🇦🇺 Sydney | 1,520 | 1959 |
| 43 | [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 |
| 44 | [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 |
| 45 | [IPH Limited](https://www.tamtam.ai/c/iph-limited) (iphltd.com.au)<br>An international group providing intellectual property services through a network of leading IP firms and an online trademark application platform | Law Practice | 🇦🇺 Sydney | 1,394 | 2014 |
| 46 | [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 |  |
| 47 | [Mark](https://www.tamtam.ai/c/mark-sydney) (mark.com.au)<br>A marketing agency founded in 2007, specializing in digital, direct, and data marketing services for various clients in Sydney and Melbourne | Advertising Services | 🇦🇺 Sydney | 1,322 | 2007 |
| 48 | [Legal Aid NSW](https://www.tamtam.ai/c/legal-aid-nsw) (legalaid.nsw.gov.au)<br>State-wide organization providing legal services to disadvantaged individuals in NSW, covering criminal, family, and civil law areas through central and regional offices Working in partnership with legal professionals | Legal Services | 🇦🇺 Haymarket | 1,311 | 1979 |
| 49 | [MPI](https://www.tamtam.ai/c/mpi) (mpirecruitment.au)<br>Specialist mining industry recruiters matching the right candidates to mining jobs, providing resources, guidance, and client care beyond placement | Mining | 🇦🇺 West Perth | 1,301 | 1995 |
| 50 | [Slater and Gordon Lawyers](https://www.tamtam.ai/c/slater-and-gordon-lawyers) (slatergordon.com.au)<br>A leading consumer law firm in Australia providing accessible and expert legal services in Compensation Law, Class Actions, Employment Law, and more | Law Practice | 🇦🇺 Melbourne | 1,298 | 1935 |
| 51 | [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 |
| 52 | [Woods Bagot](https://www.tamtam.ai/c/woods-bagot) (woodsbagot.com)<br>Global design studio with 17 studios in 6 regions, specializing in Architecture, Interiors, and Masterplanning Emphasizing collaboration and data-driven predictions of human behavior | Architecture and Planning | 🇦🇺 Melbourne | 1,233 | 1869 |
| 53 | [Gilbert + Tobin](https://www.tamtam.ai/c/gilbert-tobin) (gtlaw.com.au)<br>A leading Australian corporate law firm providing innovative legal solutions for top companies, major infrastructure providers, and government authorities worldwide | Law Practice | 🇦🇺 Barangaroo | 1,214 | 1988 |
| 54 | [William Buck](https://www.tamtam.ai/c/william-buck) (williambuck.com)<br>Providing comprehensive accounting, advisory, and support services to individuals, businesses, and community organizations in Australia and New Zealand. | Accounting | 🇦🇺 Australia | 1,159 | 1895 |
| 55 | [Hall & Wilcox](https://www.tamtam.ai/c/hall-and-wilcox) (hallandwilcox.com.au)<br>Leading Australian law firm providing innovative, client-focused legal services with a commitment to community, technology, and commercial success. | Law Practice | 🇦🇺 Melbourne | 1,159 | 1917 |
| 56 | [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 |  |
| 57 | [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 |
| 58 | [Maurice Blackburn Lawyers](https://www.tamtam.ai/c/maurice-blackburn-lawyers) (mauriceblackburn.com.au)<br>Leading plaintiff and social justice law firm in Australia, advocating for those who can't afford legal representation with over 100 years of history | Law Practice | 🇦🇺 Melbourne | 1,107 | 1919 |
| 59 | [Mills Oakley](https://www.tamtam.ai/c/mills-oakley) (millsoakley.com.au)<br>A national law firm offering expertise in key commercial practice areas, providing superior service and value for clients at every stage | Law Practice | 🇦🇺 Melbourne | 1,100 | 1864 |
| 60 | [Architectus](https://www.tamtam.ai/c/architectus) (architectus.com.au)<br>Architectural design practice focused on creating elegant, functional, and sustainable solutions across various sectors with a collaborative and human-centric approach | Architecture and Planning | 🇦🇺 Melbourne | 1,093 | 2001 |
| 61 | [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 |  |
| 62 | [Brennan](https://www.tamtam.ai/c/brennan) (brennanit.com.au)<br>An Australian systems integrator with operations in Australia and Asia, serving over 1,400 customers with a focus on digital transformation | IT Services and IT Consulting | 🇦🇺 Barangaroo | 1,059 | 1997 |
| 63 | [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 |  |
| 64 | [Sparke Helmore Lawyers](https://www.tamtam.ai/c/sparke-helmore-lawyers) (sparke.com.au)<br>National Australian law firm specializing in corporate, insurance, government, property, workplace law with over 950 professionals across ten offices. | Law Practice | 🇦🇺 Sydney | 1,025 | 1882 |
| 65 | [Randstad Australia](https://www.tamtam.ai/c/randstad-australia) (randstad.com.au)<br>Connecting diverse talent with clients to build agile, high-quality workforces, supporting career growth and business success worldwide. | Staffing and Recruiting | 🇦🇺 Wynyard | 1,009 |  |
| 66 | [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 |
| 67 | [PeopleIN](https://www.tamtam.ai/c/peoplein) (peoplein.com.au)<br>A leading Australian group of workforce and staffing brands specialising in niche talent across various sectors, offering expertise at scale | Staffing and Recruiting | 🇦🇺 Fortitude Valley | 974 |  |
| 68 | [Sedgman](https://www.tamtam.ai/c/sedgman) (sedgman.com)<br>Design, delivery, and operation of high-performance minerals processing plants and mine-site infrastructure for coal, metals, and industrial minerals. | Mining | 🇦🇺 South Bank | 961 |  |
| 69 | [PKF - Australia](https://www.tamtam.ai/c/pkf-australia) (pkf.com.au)<br>A global community of business and wealth advisors creating opportunities for client, employee, and community success through a network of member firms | Accounting | 🇦🇺 Melbourne | 956 | 1968 |
| 70 | [Gadens](https://www.tamtam.ai/c/gadens) (gadens.com)<br>Providing comprehensive legal services across banking, corporate, disputes, employment, IP, real estate, supporting complex client needs nationwide. | Law Practice | 🇦🇺 Melbourne | 933 |  |
| 71 | [Maddocks](https://www.tamtam.ai/c/maddocks) (maddocks.com.au)<br>An independent Australian law firm with offices in Canberra, Melbourne, and Sydney, providing practical legal services to corporations, businesses, and governments | Law Practice | 🇦🇺 Melbourne | 928 | 1885 |
| 72 | [Knight Frank Australia](https://www.tamtam.ai/c/knight-frank-australia) (knightfrank.com.au)<br>Providing expert commercial and residential property advisory and transactional services with innovative, data-driven solutions and extensive local market knowledge. | Real Estate | 🇦🇺 Sydney | 913 | 1896 |
| 73 | [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 |
| 74 | [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 |
| 75 | [Wotton Kearney](https://www.tamtam.ai/c/wotton-kearney) (wottonkearney.com)<br>Specializing in insurance, risk management, and dispute resolution, the company serves a wide range of clients with a focus on building lasting relationships and achieving the best outcomes | Law Practice | 🇦🇺 Sydney | 901 |  |
| 76 | [Deloitte Legal](https://www.tamtam.ai/c/deloitte-legal) (deloittelegal.com)<br>A global network of legal professionals providing strategic business advice, corporate guidance, and efficient legal solutions for clients worldwide | Law Practice | 🇦🇺 Canberra | 876 |  |
| 77 | [Duratec](https://www.tamtam.ai/c/duratec) (duratec.com.au)<br>Specializing in steel and concrete protection and remediation, offering cost-effective solutions to extend asset life through innovative programs and methodologies | Construction | 🇦🇺 Wangara | 873 |  |
| 78 | [Empired](https://www.tamtam.ai/c/empired) (empired.com)<br>The company provides IT services and solutions to improve productivity, empower staff, and automate business processes for organizations of all sizes and industries | IT Services and IT Consulting | 🇦🇺 Perth | 851 |  |
| 79 | [Thomsons](https://www.tamtam.ai/c/thomsons) (tglaw.com.au)<br>Large Australian law firm with over 800 staff and 155 partners, operating across six major cities providing corporate legal services. | Law Practice | 🇦🇺 Sydney | 846 |  |
| 80 | [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 |
| 81 | [DBM Vircon](https://www.tamtam.ai/c/dbm-vircon) (dbmvircon.com)<br>Specializing in construction modeling and digital engineering, we bring innovative solutions to optimize project delivery and overcome challenges through design innovation | Construction | 🇦🇺 South Brisbane | 845 |  |
| 82 | [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 |
| 83 | [Lander & Rogers](https://www.tamtam.ai/c/lander-and-rogers) (landers.com.au)<br>Providing practical, commercial legal advice with exceptional client service across government, insurance, real estate, retail, private clients, and technology sectors. | Law Practice | 🇦🇺 Melbourne | 833 |  |
| 84 | [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 |
| 85 | [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 |
| 86 | [Hassell](https://www.tamtam.ai/c/hassell) (hassellstudio.com)<br>An international design practice with studios worldwide, creating the best places people love through holistic thinking and integrated design teams | Architecture and Planning | 🇦🇺 Melbourne | 791 | 1938 |
| 87 | [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 |  |
| 88 | [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 |
| 89 | [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 |  |
| 90 | [Oncall](https://www.tamtam.ai/c/oncall) (oncallservices.com)<br>A global leader in interpreting and translation services, offering solutions in over 230 languages with a focus on quality and client satisfaction | Translation and Localization | 🇦🇺 South Melbourne | 758 | 1984 |
| 91 | [Moray & Agnew](https://www.tamtam.ai/c/moray-and-agnew) (moray.com.au)<br>national law firm specializing in insurance, commercial disputes, construction, corporate, property, and workplace legal services across multiple Australian cities | Law Practice | 🇦🇺 | 755 |  |
| 92 | [Opteon AUS & NZ](https://www.tamtam.ai/c/opteon-aus-and-nz) (opteonsolutions.com)<br>A national provider of valuation and property advisory services with expertise in residential, commercial, government, agribusiness, and more for various clients | Real Estate | 🇦🇺 Melbourne | 754 | 2005 |
| 93 | [Shine Lawyers](https://www.tamtam.ai/c/shine-lawyers) (shine.com.au)<br>Provide legal support and advocacy for clients facing injustice, fostering a collaborative environment focused on growth and challenging norms. | Law Practice | 🇦🇺 Brisbane | 753 | 1976 |
| 94 | [HLB Mann Judd](https://www.tamtam.ai/c/hlb-mann-judd) (hlb.com.au)<br>Award-winning chartered accounting firm providing financial advisory, business advice, and personalized client service across Australia, New Zealand, and Fiji. | Accounting | 🇦🇺 Sydney | 736 | 1982 |
| 95 | [Herron Todd White](https://www.tamtam.ai/c/herron-todd-white) (htw.com.au)<br>Independent property valuation and advisory services across Australia, specializing in residential, commercial, agribusiness, and government asset markets. | Real Estate | 🇦🇺 Chermside | 724 | 1968 |
| 96 | [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 |
| 97 | [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 |
| 98 | [Ambition](https://www.tamtam.ai/c/ambition-sydney) (ambitiongrouplimited.com)<br>Specialized international recruitment firm with diverse expertise in various industries, providing career opportunities and personalized service to clients and candidates worldwide | Staffing and Recruiting | 🇦🇺 Sydney | 684 | 1999 |
| 99 | [aecc](https://www.tamtam.ai/c/aecc) (partner.aeccglobal.com)<br>An international student recruitment organization guiding students through the education and immigration process, serving clients worldwide with personalized and ethical assistance | Education Administration Programs | 🇦🇺 Melbourne | 683 |  |
| 100 | [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 |

## 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)
- [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)
- [Consulting firms in Australia](https://www.tamtam.ai/l/consulting-firms-australia) (210)
- [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

- [Professional services firms in New South Wales](https://www.tamtam.ai/l/professional-services-firms-new-south-wales) (140)
- [Professional services firms in Victoria](https://www.tamtam.ai/l/professional-services-firms-victoria) (121)
- [Professional services firms in Queensland](https://www.tamtam.ai/l/professional-services-firms-queensland) (47)
- [Professional services firms in Western Australia](https://www.tamtam.ai/l/professional-services-firms-western-australia) (37)
- [Professional services firms in Sydney](https://www.tamtam.ai/l/professional-services-firms-sydney) (93)
- [Professional services firms in Melbourne](https://www.tamtam.ai/l/professional-services-firms-melbourne) (76)

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