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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).

馃嚘馃嚭 Australia100 companiesUpdated Nov 11, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
Worleyworley.com

Global professional services company specializing in energy, chemicals, and resources, providing integrated solutions for project delivery and asset management

Professional Services 馃嚘馃嚭 Sydney 37,425 n/a
2
Macquarie Groupmacquarie.com

Global financial services organization empowering people to innovate and invest for a better future in 34 markets Visit wwwmacquariecom for more information

Financial Services 馃嚘馃嚭 Sydney 20,757 1969
3
GHDghd.com

A global network of professionals providing integrated solutions in water, energy, and communities through engineering, environmental, design, and construction expertise

Civil Engineering 馃嚘馃嚭 Sydney 17,363 1928
4
ALSalsglobal.com

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 馃嚘馃嚭 Bowen Hills 13,323 n/a
5
SEOoptimising.com.au

A leading SEO agency with over 15 years of experience, offering in-house services for web development, PR, copywriting, and digital marketing

Advertising Services 馃嚘馃嚭 Melbourne 10,205 1999
6
KPMG Australiakpmg.com.au

Professional services firm offering audit, tax, legal, management consulting, and digital solutions to diverse industries and sectors in Australia.

Business Consulting and Services 馃嚘馃嚭 Sydney 9,429 n/a
7
Aureconaurecongroup.com

Design, engineering, and advisory company focusing on creating a better future through innovative solutions across various markets and asset types

Engineering Services 馃嚘馃嚭 Docklands 8,800 2009
8
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

Management Consulting 馃嚘馃嚭 Sydney 7,674 n/a
9
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

Engineering Services 馃嚘馃嚭 North Sydney 7,311 1970
10
MNCmnca.com.au

The company specializes in solving insurance, reinsurance, superannuation, and risk-related problems through tailored consulting services by experienced professionals

Insurance 馃嚘馃嚭 Barangaroo 6,235 2010
11
PwC Australiapwc.com.au

Professional services focused on building trust in society and solving important problems through insights and expertise from people.

Business Consulting and Services 馃嚘馃嚭 Sydney 5,636 n/a
12
ILS Worldils.world

Global provider of independent fiduciary services creating and managing bespoke structures for personal and commercial needs, with offices in various jurisdictions

Financial Services 馃嚘馃嚭 Victoria Road 5,197 1991
13
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

Professional Services 馃嚘馃嚭 Sydney 4,487 n/a
14
Ausencoausenco.com

A global company offering sustainable solutions for minerals, metals, and industrial sectors through consulting, engineering, project delivery, and asset optimization

Professional Services 馃嚘馃嚭 South Brisbane 4,227 1991
15
TOA Globaltoaglobal.com

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 馃嚘馃嚭 Southport 3,820 2013
16
Rider Levett Bucknall RLBrlb.com

Specialists in cost management, quantity surveying, project management, and sustainability services for landmark and ambitious construction projects worldwide.

Construction 馃嚘馃嚭 3,622 n/a
17
NGO Recruitmentngorecruitment.com

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 馃嚘馃嚭 Sydney 3,516 2004
18
MinterEllisonminterellison.com

Provides comprehensive legal and consulting services, solving complex problems with a heritage of excellence and strong client relationships.

Law Practice 馃嚘馃嚭 Australia 2,758 1827
19
X-Teamx-team.com

Providing vetted, high-performing remote developers to integrate seamlessly with existing teams, enhancing engineering capabilities across diverse industries.

Staffing and Recruiting 馃嚘馃嚭 Chelsea 2,737 2006
20
Hudsonau.hudson.com

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 馃嚘馃嚭 Sydney 2,664 1985
21
BDO in Australiabdo.com.au

Providing audit, tax, and advisory services to diverse clients including corporations, private businesses, entrepreneurs, and individuals across industries.

Accounting 馃嚘馃嚭 Brisbane 2,590 n/a
22
EML Groupeml.com.au

Specialists in work health and safety, offering tailored injury prevention, claims management, and return-to-work support for businesses and injured workers

Insurance 馃嚘馃嚭 Sydney 2,474 n/a
23
Tetra Tech Coffeytetratechcoffey.com

Leading provider of engineering and consulting services, specializing in environmental, geotechnical, and project management Extensive expertise for complex projects worldwide

Business Consulting and Services 馃嚘馃嚭 Chatswood 2,362 n/a
24
Healthcare Australiahealthcareaustralia.com.au

A healthcare staffing agency offering solutions to the growing nursing and medical skills shortage, allowing professionals flexibility in their work

Health and Human Services 馃嚘馃嚭 Melbourne 2,346 n/a
25
Accenture Australiaaccenture.com

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 馃嚘馃嚭 Melbourne VIC 2,305 1989
26
ANZUK Education Australiaanzuk.education

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 馃嚘馃嚭 Collingwood 2,210 2004
27
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

Outsourcing and Offshoring Consulting 馃嚘馃嚭 West Perth 2,198 1997
28
Allensallens.com.au

An international organization with a rich history of shaping legislation and regulatory frameworks, providing global legal services to clients worldwide

Law Practice 馃嚘馃嚭 Sydney 2,180 1822
29
Findexfindex.com.au

Provider of integrated financial advisory and accounting services across Australia and New Zealand, focusing on holistic, technology-driven client solutions.

Financial Services 馃嚘馃嚭 Melbourne 2,004 1987
30
Planitplanit.com

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 馃嚘馃嚭 Sydney 1,931 1997
31
HWLE Lawyershwlebsworth.com.au

Providing expert commercial legal services across Australia with high partner involvement, focusing on client outcomes and efficient problem-solving.

Law Practice 馃嚘馃嚭 Melbourne 1,914 n/a
32
Clayton Utzclaytonutz.com

Provides tailored legal advice and services to private sector and government clients across Australia with honesty and entrepreneurial spirit.

Law Practice 馃嚘馃嚭 Sydney 1,876 1833
33
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

Accounting 馃嚘馃嚭 Perth 1,841 1922
34
IPAsynergieaustralia.com.au

A national recruitment agency in Australia, providing temporary, permanent, and diversity recruitment services while supporting people with disabilities

Staffing and Recruiting 馃嚘馃嚭 Melbourne 1,838 1984
35
WorkPacworkpac.com

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 馃嚘馃嚭 Fortitude Valley 1,749 1997
36
Befreebefreeltd.com

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 馃嚘馃嚭 Parramatta 1,743 2006
37
Grant Thornton Australiagrantthornton.com.au

Experienced professionals providing audit, assurance, tax, and advisory services with a focus on client care and principled execution.

Accounting 馃嚘馃嚭 Sydney 1,739 n/a
38
Talenttalentinternational.com

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 馃嚘馃嚭 Sydney 1,608 1995
39
AS White Globalaswhiteglobal.com

Specializing in international staffing solutions since 2011, we help Australian companies build highly capable international teams for long-term success

Staffing and Recruiting 馃嚘馃嚭 Sydney 1,583 2011
40
Corrs Chambers Westgarthcorrs.com.au

Providing comprehensive legal services including major transactions, complex disputes, strategic advice, and international law expertise for global clients.

Law Practice 馃嚘馃嚭 Sydney 1,582 n/a
41
Pitcher Partnerspitcher.com.au

Accounting, audit, and advisory services focused on middle market businesses, family-owned firms, high net-worth individuals, and public sector clients.

Accounting 馃嚘馃嚭 Docklands 1,546 1991
42
Chandler Macleodchandlermacleod.com

Providing recruitment, staffing, and workforce management services with psychological assessment to help clients select, retain, and develop talent.

Human Resources Services 馃嚘馃嚭 Sydney 1,520 1959
43
CyberCX

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 馃嚘馃嚭 Melbourne 1,431 2019
44
Data#3data3.com

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 馃嚘馃嚭 Toowong 1,413 1977
45
IPH Limitediphltd.com.au

An international group providing intellectual property services through a network of leading IP firms and an online trademark application platform

Law Practice 馃嚘馃嚭 Sydney 1,394 2014
46
Advisianadvisian.com

Advisian provides comprehensive consulting services to solve resource, energy, and infrastructure challenges worldwide, delivering strategic, practical, and commercially oriented solutions

Business Consulting and Services 馃嚘馃嚭 North Sydney 1,360 n/a
47
Markmark.com.au

A marketing agency founded in 2007, specializing in digital, direct, and data marketing services for various clients in Sydney and Melbourne

Advertising Services 馃嚘馃嚭 Sydney 1,322 2007
48
Legal Aid NSWlegalaid.nsw.gov.au

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 馃嚘馃嚭 Haymarket 1,311 1979
49
MPImpirecruitment.au

Specialist mining industry recruiters matching the right candidates to mining jobs, providing resources, guidance, and client care beyond placement

Mining 馃嚘馃嚭 West Perth 1,301 1995
50
Slater and Gordon Lawyersslatergordon.com.au

A leading consumer law firm in Australia providing accessible and expert legal services in Compensation Law, Class Actions, Employment Law, and more

Law Practice 馃嚘馃嚭 Melbourne 1,298 1935

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51
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

Professional Services 馃嚘馃嚭 Perth 1,239 1992
52
Woods Bagotwoodsbagot.com

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 馃嚘馃嚭 Melbourne 1,233 1869
53
Gilbert + Tobingtlaw.com.au

A leading Australian corporate law firm providing innovative legal solutions for top companies, major infrastructure providers, and government authorities worldwide

Law Practice 馃嚘馃嚭 Barangaroo 1,214 1988
54
William Buckwilliambuck.com

Providing comprehensive accounting, advisory, and support services to individuals, businesses, and community organizations in Australia and New Zealand.

Accounting 馃嚘馃嚭 Australia 1,159 1895
55
Hall & Wilcoxhallandwilcox.com.au

Leading Australian law firm providing innovative, client-focused legal services with a commitment to community, technology, and commercial success.

Law Practice 馃嚘馃嚭 Melbourne 1,159 1917
56
Cardnostantec.com

A company has rebranded to Stantec Follow the Stantec page for updates

Design Services 馃嚘馃嚭 Fortitude Valley 1,155 n/a
57
Urbisurbis.com.au

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 馃嚘馃嚭 Melbourne 1,139 1963
58
Maurice Blackburn Lawyersmauriceblackburn.com.au

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 馃嚘馃嚭 Melbourne 1,107 1919
59
Mills Oakleymillsoakley.com.au

A national law firm offering expertise in key commercial practice areas, providing superior service and value for clients at every stage

Law Practice 馃嚘馃嚭 Melbourne 1,100 1864
60
Architectusarchitectus.com.au

Architectural design practice focused on creating elegant, functional, and sustainable solutions across various sectors with a collaborative and human-centric approach

Architecture and Planning 馃嚘馃嚭 Melbourne 1,093 2001
61
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

Business Consulting and Services 馃嚘馃嚭 Sydney 1,079 n/a
62
Brennanbrennanit.com.au

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 馃嚘馃嚭 Barangaroo 1,059 1997
63
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

IT Services and IT Consulting 馃嚘馃嚭 Sydney 1,049 n/a
64
Sparke Helmore Lawyerssparke.com.au

National Australian law firm specializing in corporate, insurance, government, property, workplace law with over 950 professionals across ten offices.

Law Practice 馃嚘馃嚭 Sydney 1,025 1882
65
Randstad Australiarandstad.com.au

Connecting diverse talent with clients to build agile, high-quality workforces, supporting career growth and business success worldwide.

Staffing and Recruiting 馃嚘馃嚭 Wynyard 1,009 n/a
66
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

IT Services and IT Consulting 馃嚘馃嚭 Box Hill 984 1995
67
PeopleINpeoplein.com.au

A leading Australian group of workforce and staffing brands specialising in niche talent across various sectors, offering expertise at scale

Staffing and Recruiting 馃嚘馃嚭 Fortitude Valley 974 n/a
68
Sedgmansedgman.com

Design, delivery, and operation of high-performance minerals processing plants and mine-site infrastructure for coal, metals, and industrial minerals.

Mining 馃嚘馃嚭 South Bank 961 n/a
69
PKF - Australiapkf.com.au

A global community of business and wealth advisors creating opportunities for client, employee, and community success through a network of member firms

Accounting 馃嚘馃嚭 Melbourne 956 1968
70
Gadensgadens.com

Providing comprehensive legal services across banking, corporate, disputes, employment, IP, real estate, supporting complex client needs nationwide.

Law Practice 馃嚘馃嚭 Melbourne 933 n/a
71
Maddocksmaddocks.com.au

An independent Australian law firm with offices in Canberra, Melbourne, and Sydney, providing practical legal services to corporations, businesses, and governments

Law Practice 馃嚘馃嚭 Melbourne 928 1885
72
Knight Frank Australiaknightfrank.com.au

Providing expert commercial and residential property advisory and transactional services with innovative, data-driven solutions and extensive local market knowledge.

Real Estate 馃嚘馃嚭 Sydney 913 1896
73
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.

Construction 馃嚘馃嚭 Brisbane 912 1982
74
BG&Ebgeeng.com

Design and deliver engineering solutions across property, transport, water, defence, renewables, and resources sectors with technical expertise and innovation.

Engineering Services 馃嚘馃嚭 Millers Point 903 1970
75
Wotton Kearneywottonkearney.com

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 馃嚘馃嚭 Sydney 901 n/a
76
Deloitte Legaldeloittelegal.com

A global network of legal professionals providing strategic business advice, corporate guidance, and efficient legal solutions for clients worldwide

Law Practice 馃嚘馃嚭 Canberra 876 n/a
77
Duratecduratec.com.au

Specializing in steel and concrete protection and remediation, offering cost-effective solutions to extend asset life through innovative programs and methodologies

Construction 馃嚘馃嚭 Wangara 873 n/a
78
Empiredempired.com

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 馃嚘馃嚭 Perth 851 n/a
79
Thomsonstglaw.com.au

Large Australian law firm with over 800 staff and 155 partners, operating across six major cities providing corporate legal services.

Law Practice 馃嚘馃嚭 Sydney 846 n/a
80
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

IT Services and IT Consulting 馃嚘馃嚭 Sydney 846 1965
81
DBM Vircondbmvircon.com

Specializing in construction modeling and digital engineering, we bring innovative solutions to optimize project delivery and overcome challenges through design innovation

Construction 馃嚘馃嚭 South Brisbane 845 n/a
82
Calibrewsp.com

A global engineering firm offering design, engineering, advisory, and environmental services with expertise in EPCM project delivery and major capital projects

Mining 馃嚘馃嚭 Perth 834 1993
83
Lander & Rogerslanders.com.au

Providing practical, commercial legal advice with exceptional client service across government, insurance, real estate, retail, private clients, and technology sectors.

Law Practice 馃嚘馃嚭 Melbourne 833 n/a
84
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

Mining 馃嚘馃嚭 Osborne Park 821 2011
85
Scyne Advisoryscyne.com.au

Provides independent advisory services to support public sector projects and governments in Australia, focusing on resilience, security, equity, and prosperity

Business Consulting and Services 馃嚘馃嚭 Canberra 807 2023
86
Hassellhassellstudio.com

An international design practice with studios worldwide, creating the best places people love through holistic thinking and integrated design teams

Architecture and Planning 馃嚘馃嚭 Melbourne 791 1938
87
Mantelmantelgroup.com.au

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 馃嚘馃嚭 Melbourne 786 n/a
88
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

IT Services and IT Consulting 馃嚘馃嚭 Melbourne 780 2006
89
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

Automation Machinery Manufacturing 馃嚘馃嚭 Adelaide 764 n/a
90
Oncalloncallservices.com

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 馃嚘馃嚭 South Melbourne 758 1984
91
Moray & Agnewmoray.com.au

national law firm specializing in insurance, commercial disputes, construction, corporate, property, and workplace legal services across multiple Australian cities

Law Practice 馃嚘馃嚭 755 n/a
92
Opteon AUS & NZopteonsolutions.com

A national provider of valuation and property advisory services with expertise in residential, commercial, government, agribusiness, and more for various clients

Real Estate 馃嚘馃嚭 Melbourne 754 2005
93
Shine Lawyersshine.com.au

Provide legal support and advocacy for clients facing injustice, fostering a collaborative environment focused on growth and challenging norms.

Law Practice 馃嚘馃嚭 Brisbane 753 1976
94
HLB Mann Juddhlb.com.au

Award-winning chartered accounting firm providing financial advisory, business advice, and personalized client service across Australia, New Zealand, and Fiji.

Accounting 馃嚘馃嚭 Sydney 736 1982
95
Herron Todd Whitehtw.com.au

Independent property valuation and advisory services across Australia, specializing in residential, commercial, agribusiness, and government asset markets.

Real Estate 馃嚘馃嚭 Chermside 724 1968
96
Nova Systemsnovasystems.com

Design, integration, and delivery of complex programs for Defence, emergency services, and civil applications with deep operational understanding.

Engineering Services 馃嚘馃嚭 Adelaide 695 1999
97
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

Management Consulting 馃嚘馃嚭 Fortitude Valley 686 1970
98
Ambitionambitiongrouplimited.com

Specialized international recruitment firm with diverse expertise in various industries, providing career opportunities and personalized service to clients and candidates worldwide

Staffing and Recruiting 馃嚘馃嚭 Sydney 684 1999
99
aeccpartner.aeccglobal.com

An international student recruitment organization guiding students through the education and immigration process, serving clients worldwide with personalized and ethical assistance

Education Administration Programs 馃嚘馃嚭 Melbourne 683 n/a
100
NDYndy.com

The company focuses on delivering successful outcomes for challenging projects by fostering client relationships based on trust, collaboration, and innovation

Engineering Services 馃嚘馃嚭 Melbourne 680 1972

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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.

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