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.
| # | 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 |
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 |
20,757 | |||
| 3 | 17,363 | ||||
| 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 |
13,323 | |||
| 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 |
10,205 | |||
| 6 |
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 | |||
| 7 |
Aureconaurecongroup.com
Design, engineering, and advisory company focusing on creating a better future through innovative solutions across various markets and asset types |
8,800 | |||
| 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 |
7,674 | |||
| 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 |
7,311 | |||
| 10 |
MNCmnca.com.au
The company specializes in solving insurance, reinsurance, superannuation, and risk-related problems through tailored consulting services by experienced professionals |
6,235 | |||
| 11 |
PwC Australiapwc.com.au
Professional services focused on building trust in society and solving important problems through insights and expertise from people. |
5,636 | |||
| 12 | 5,197 | ||||
| 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 |
4,487 | |||
| 14 |
Ausencoausenco.com
A global company offering sustainable solutions for minerals, metals, and industrial sectors through consulting, engineering, project delivery, and asset optimization |
4,227 | |||
| 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 |
3,820 | |||
| 16 |
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 | |||
| 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 |
3,516 | |||
| 18 |
MinterEllisonminterellison.com
Provides comprehensive legal and consulting services, solving complex problems with a heritage of excellence and strong client relationships. |
2,758 | |||
| 19 |
X-Teamx-team.com
Providing vetted, high-performing remote developers to integrate seamlessly with existing teams, enhancing engineering capabilities across diverse industries. |
2,737 | |||
| 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 |
2,664 | |||
| 21 |
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 | |||
| 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 |
2,474 | |||
| 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 |
2,362 | |||
| 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 |
2,346 | |||
| 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 |
2,305 | |||
| 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 |
2,210 | |||
| 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 |
2,198 | |||
| 28 |
Allensallens.com.au
An international organization with a rich history of shaping legislation and regulatory frameworks, providing global legal services to clients worldwide |
2,180 | |||
| 29 |
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 | |||
| 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 |
1,931 | |||
| 31 |
HWLE Lawyershwlebsworth.com.au
Providing expert commercial legal services across Australia with high partner involvement, focusing on client outcomes and efficient problem-solving. |
1,914 | |||
| 32 |
Clayton Utzclaytonutz.com
Provides tailored legal advice and services to private sector and government clients across Australia with honesty and entrepreneurial spirit. |
1,876 | |||
| 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 |
1,841 | |||
| 34 |
IPAsynergieaustralia.com.au
A national recruitment agency in Australia, providing temporary, permanent, and diversity recruitment services while supporting people with disabilities |
1,838 | |||
| 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 |
1,749 | |||
| 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 |
1,743 | |||
| 37 |
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 | |||
| 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. |
1,608 | |||
| 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 |
1,583 | |||
| 40 |
Corrs Chambers Westgarthcorrs.com.au
Providing comprehensive legal services including major transactions, complex disputes, strategic advice, and international law expertise for global clients. |
1,582 | |||
| 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. |
1,546 | |||
| 42 |
Chandler Macleodchandlermacleod.com
Providing recruitment, staffing, and workforce management services with psychological assessment to help clients select, retain, and develop talent. |
1,520 | |||
| 43 |
CyberCX
Provides comprehensive cybersecurity services including consulting, incident response, security testing, and managed solutions to organizations across various sectors, ensuring digital resilience. |
1,431 | |||
| 44 | 1,413 | ||||
| 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 |
1,394 | |||
| 46 |
Advisianadvisian.com
Advisian provides comprehensive consulting services to solve resource, energy, and infrastructure challenges worldwide, delivering strategic, practical, and commercially oriented solutions |
1,360 | |||
| 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 |
1,322 | |||
| 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 |
1,311 | |||
| 49 |
MPImpirecruitment.au
Specialist mining industry recruiters matching the right candidates to mining jobs, providing resources, guidance, and client care beyond placement |
1,301 | |||
| 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 |
1,298 | |||
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. | |||||
| 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 |
1,239 | |||
| 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 |
1,233 | |||
| 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 |
1,214 | |||
| 54 |
William Buckwilliambuck.com
Providing comprehensive accounting, advisory, and support services to individuals, businesses, and community organizations in Australia and New Zealand. |
1,159 | |||
| 55 |
Hall & Wilcoxhallandwilcox.com.au
Leading Australian law firm providing innovative, client-focused legal services with a commitment to community, technology, and commercial success. |
1,159 | |||
| 56 | 1,155 | ||||
| 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 |
1,139 | |||
| 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 |
1,107 | |||
| 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 |
1,100 | |||
| 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 |
1,093 | |||
| 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 |
1,079 | |||
| 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 |
1,059 | |||
| 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 |
1,049 | |||
| 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. |
1,025 | |||
| 65 |
Randstad Australiarandstad.com.au
Connecting diverse talent with clients to build agile, high-quality workforces, supporting career growth and business success worldwide. |
1,009 | |||
| 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 |
984 | |||
| 67 |
PeopleINpeoplein.com.au
A leading Australian group of workforce and staffing brands specialising in niche talent across various sectors, offering expertise at scale |
974 | |||
| 68 |
Sedgmansedgman.com
Design, delivery, and operation of high-performance minerals processing plants and mine-site infrastructure for coal, metals, and industrial minerals. |
961 | |||
| 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 |
956 | |||
| 70 |
Gadensgadens.com
Providing comprehensive legal services across banking, corporate, disputes, employment, IP, real estate, supporting complex client needs nationwide. |
933 | |||
| 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 |
928 | |||
| 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. |
913 | |||
| 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. |
912 | |||
| 74 |
BG&Ebgeeng.com
Design and deliver engineering solutions across property, transport, water, defence, renewables, and resources sectors with technical expertise and innovation. |
903 | |||
| 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 |
901 | |||
| 76 |
Deloitte Legaldeloittelegal.com
A global network of legal professionals providing strategic business advice, corporate guidance, and efficient legal solutions for clients worldwide |
876 | |||
| 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 |
873 | |||
| 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 |
851 | |||
| 79 |
Thomsonstglaw.com.au
Large Australian law firm with over 800 staff and 155 partners, operating across six major cities providing corporate legal services. |
846 | |||
| 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 |
846 | |||
| 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 |
845 | |||
| 82 | 834 | ||||
| 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. |
833 | |||
| 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 |
821 | |||
| 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 |
807 | |||
| 86 |
Hassellhassellstudio.com
An international design practice with studios worldwide, creating the best places people love through holistic thinking and integrated design teams |
791 | |||
| 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. |
786 | |||
| 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 |
780 | |||
| 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 |
764 | |||
| 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 |
758 | |||
| 91 |
Moray & Agnewmoray.com.au
national law firm specializing in insurance, commercial disputes, construction, corporate, property, and workplace legal services across multiple Australian cities |
755 | |||
| 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 |
754 | |||
| 93 |
Shine Lawyersshine.com.au
Provide legal support and advocacy for clients facing injustice, fostering a collaborative environment focused on growth and challenging norms. |
753 | |||
| 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. |
736 | |||
| 95 |
Herron Todd Whitehtw.com.au
Independent property valuation and advisory services across Australia, specializing in residential, commercial, agribusiness, and government asset markets. |
724 | |||
| 96 |
Nova Systemsnovasystems.com
Design, integration, and delivery of complex programs for Defence, emergency services, and civil applications with deep operational understanding. |
695 | |||
| 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 |
686 | |||
| 98 |
Ambitionambitiongrouplimited.com
Specialized international recruitment firm with diverse expertise in various industries, providing career opportunities and personalized service to clients and candidates worldwide |
684 | |||
| 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 |
683 | |||
| 100 | 680 | ||||
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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.
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