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The 100 largest professional services firms in the world

Tamtam tracks 24,737 professional services firms worldwide. This list ranks the 100 largest by number of employees on LinkedIn, led by Tata Consultancy Services, Randstad and Deloitte. Their median headcount is 44,836. Half of them were founded in 1969 or later. The most common headquarters are London (9), New York (9) and Paris (6).

馃實 World100 companiesUpdated Nov 12, 2026

These are large professional services firms worldwide, primarily focusing on IT services, business consulting, and human resources. The companies listed are substantial in size, with employee counts ranging from over 100,000 to over 700,000.

Notable companies include Tata Consultancy Services, which provides technology services globally; Randstad, offering workforce solutions and HR advice; Deloitte, a global professional services firm; and EY, providing assurance, consulting, and tax services. Many of these firms, such as Capgemini and Concentrix, specialize in leveraging AI and technology for digital transformation and customer experience.

#CompanyIndustryHeadquarters EmployeesFounded
1
Tata Consultancy Servicestcs.com

Provides technology services worldwide, enabling client transformation across the AI stack, fostering innovation, engineering excellence, and customer service for adaptive enterprises.

IT Services and IT Consulting 馃嚠馃嚦 Mumbai 708,725 1968
2
Randstadrandstad.com

Provides companies with quality workforces, helps people find jobs, advises on HR needs, and offers training, combining technology with personalized human attention.

Human Resources Services 馃嚦馃嚤 Diemen 653,000 1960
3
Deloittedeloitte.com

Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity

Business Consulting and Services 馃嚭馃嚫 Worldwide 526,765 1845
4
EYey.com

A global organization with diverse teams in over 150 countries provides assurance, consulting, law, strategy, tax, and transactions to help clients grow and transform

Professional Services 馃嚞馃嚙 London 404,207 n/a
5
Capgeminicapgemini.com

Imagine future organizations, making it real with AI, technology, and people, delivering end-to-end services and solutions across strategy, technology, design, engineering and business operations

IT Services and IT Consulting 馃嚝馃嚪 Paris 342,989 n/a
6
KPMG Italykpmg.com

A global professional services network providing audit, advisory, tax, and legal services to businesses worldwide, focusing on building trust and driving change

Business Consulting and Services 馃嚠馃嚬 Milan 265,000 1987
7
KPMGkpmg.com

Global network of professional firms offering Audit, Tax and Advisory services in 146 countries Industry-focused professionals delivering value with clear vision and defined values

Accounting 馃嚭馃嚫 Toronto 265,000 n/a
8
Concentrixconcentrix.com

Provides customer experience solutions and technology, improving business performance for global brands across various industries, creating better business outcomes.

IT Services and IT Consulting 馃嚭馃嚫 Newark 218,681 1983
9
Adeccoadecco.com

Top provider of HR solutions matching talented individuals with job opportunities worldwide, offering industry insight, training, and mentoring for career development

Staffing and Recruiting 馃嚚馃嚟 Zurich 199,071 n/a
10
TECH MAHINDRAtechmahindra.com

Tech Mahindra offers innovative IT experiences globally, leveraging next-gen technologies for digital transformation Part of Mahindra Group, driving sustainable business and societal change

IT Services and IT Consulting 馃嚠馃嚦 Pune 159,000 1986
11
Allianz Servicescareers.allianz.com

Provides specialized core insurance operations, shared services, business analytics, engineering, and management consulting to drive client experience within a global insurance group.

Financial Services 馃嚛馃嚜 Munich 159,000 n/a
12
Genpactgenpact.com

A global professional services firm with over 125,000 employees in 30+ countries, specializing in digital operations, data, technology, and AI solutions for leading enterprises

Business Consulting and Services 馃嚭馃嚫 New York 151,199 1997
13
FUJITSUglobal.fujitsu

Leading global information and communication technology company, offering technology products, solutions, and services, connecting people, technology, and ideas for a sustainable world.

IT Services and IT Consulting 馃嚞馃嚙 124,000 1935
14
G4Sg4s.com

A leading security and facility services company providing proactive security services, cutting-edge technology, and integrated solutions to help clients focus on their core business

Security and Investigations 馃嚞馃嚙 London 116,486 1901
15
JLLjill.com

A leading professional services firm specializing in real estate and investment management, creating rewarding opportunities and sustainable solutions using advanced technology

Real Estate 馃嚭馃嚫 Chicago 104,899 n/a
16
Allied Universalaus.com

Provides tailored security and facility services using smart technology, supporting diverse sectors with local leadership and community presence.

Professional Services 馃嚭馃嚫 Irvine 104,797 n/a
17
LTIMindtreeltm.com

A global technology consulting company driving digital transformation for enterprises, delivering superior business outcomes through domain expertise and innovative digital solutions

IT Services and IT Consulting 馃嚠馃嚦 Mumbai 99,387 n/a
18
Aonaon.com

The company provides advice and solutions to clients worldwide, helping them make better decisions to protect and grow their business

Financial Services 馃嚞馃嚙 London 93,574 n/a
19
DXC Technologydxc.com

It assists global companies in managing critical systems, modernizing IT, optimizing data, and ensuring security across various cloud environments.

IT Services and IT Consulting 馃嚭馃嚫 Ashburn 90,597 2017
20
Kyndrylkyndryl.com

A global leader in designing, running, and managing advanced technology infrastructure, focusing on excellence, innovation, and advancing vital systems for human progress

IT Services and IT Consulting 馃嚭馃嚫 New York 90,000 2021
21
Accenture in Indiaaccenture.com

Global professional services company specializing in digital, cloud, and security solutions across 40+ industries with a focus on technology and human ingenuity for global clients

IT Services and IT Consulting 馃嚠馃嚦 Bengaluru 81,860 1989
22
Goldman Sachsgoldmansachs.com

Global financial institution providing expert capital markets services, investment banking, and asset management for clients through partnership, integrity, and world-class operational excellence.

Financial Services 馃嚭馃嚫 New York 76,000 n/a
23
CBREcbre.com

A real estate company providing comprehensive services and insights to empower clients in maximizing opportunities and success in the industry

Real Estate 馃嚭馃嚫 Dallas 75,008 n/a
24
SGSsgs.com

Leading global company providing testing, inspection, and certification services to help organizations achieve high standards of quality, compliance, and sustainability.

Professional Services 馃嚚馃嚟 Baar 74,385 n/a
25
ManpowerGroupmanpowergroup.com

Global workforce solutions company sourcing, assessing, and managing talent for organizations worldwide, while providing sustainable employment opportunities across various industries and skills

Staffing and Recruiting 馃嚭馃嚫 Milwaukee 72,454 1948
26
Jacobsjacobs.com

Delivering outcomes and solutions for complex challenges in advanced manufacturing, cities, energy, environment, life sciences, transportation, and water, from advisory to lifecycle management.

Business Consulting and Services 馃嚭馃嚫 Dallas 68,461 1947
27
Compass Group USAcompassgroupcareers.com

Redefines food and facility services, delivering excellence to healthcare, education, cultural centers, sports venues, and corporations. Recognized for innovation, diversity, and trustworthiness.

Food and Beverage Services 馃嚭馃嚫 Charlotte 68,303 n/a
28
EPAM Systemsepam.com

Global digital transformation services provider specializing in product development and engineering, creating better enterprise, education, and health platforms worldwide

IT Services and IT Consulting 馃嚭馃嚫 Newtown 66,049 1993
29
ISS A/Sissworld.com

A workplace experience and facility management company that provides placemaking solutions for better business performance and enjoyable work environments

Facilities Services 馃嚛馃嚢 Copenhagen 64,283 n/a
30
WNSwns.com

Global provider of digital-led business transformation, combining industry knowledge, technology, analytics, and process expertise to deliver innovative solutions.

Business Consulting and Services 馃嚭馃嚫 New York 61,367 1996
31
Halliburtonhalliburton.com

Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production.

Oil and Gas 馃嚭馃嚫 Houston 60,277 1919
32
HDB Financial Services Ltd.hdbfs.com

Provides diverse financial lending products like personal, business, and vehicle loans, alongside BPO services such as collection call centers and back-office operations for individuals and businesses.

Financial Services 馃嚠馃嚦 Mumbai 60,142 2007
33
EXLexlservice.com

The company partners with businesses to tailor data-driven solutions, improve efficiency, enhance customer relationships, and drive revenue growth through collaboration and technology

Business Consulting and Services 馃嚭馃嚫 New York 58,974 1999
34
AECOMaecom.com

A global infrastructure consulting firm providing professional services in advisory, planning, design, engineering, and construction management for public and private-sector clients

Civil Engineering 馃嚭馃嚫 Dallas 57,963 n/a
35
Aramarkaramark.com

Global hospitality service provider delivering food and facilities management to educational institutions, healthcare providers, sports teams, and municipalities across sixteen countries worldwide.

Hospitality 馃嚭馃嚫 Philadelphia 56,723 1939
36
WTWwtwco.com

Offering data-driven solutions in people, risk, and capital areas, leveraging global expertise to enhance strategy, resilience, workforce motivation, and performance

Financial Services 馃嚞馃嚙 London 55,656 n/a
37
Bureau Veritasbureauveritas.com

A global leader in testing, inspection, and certification services, fostering confidence through expertise and independence while addressing crucial societal and environmental challenges

Environmental Services 馃嚝馃嚪 Paris 55,072 1828
38
Restaurantegonzaloveci.com

A restaurant located in San Pedro Sula, offering food and dining services to customers in the area

Operations Consulting 馃嚭馃嚫 Zurich 53,004 2023
39
Cushman & Wakefieldcushmanwakefield.com

Global commercial real estate services provider with 52,000 professionals focused on advancing client, colleague, and community outcomes worldwide.

Real Estate 馃嚭馃嚫 Chicago 53,000 1917
40
Gallaghergallagher.com

Global insurance brokerage offering risk management, consulting, employee benefits, claims management, and retirement services to protect assets and support clients.

Insurance 馃嚭馃嚫 Rolling Meadows 52,767 n/a
41
Almaviva Groupalmavivagroup.com

Provides digital innovation and ICT solutions globally, supporting business model transformation and competitiveness across public and private sectors.

IT Services and IT Consulting 馃嚠馃嚬 Rome 52,112 2005
42
ALTRADaltrad.com

Global provider of industrial services and equipment manufacturing, offering high-value solutions across energy, oil & gas, construction, and environmental sectors.

Environmental Services 馃嚝馃嚪 Montpellier 52,000 1985
43
BDObdo.global

Providing professional services globally with 1800 offices, focusing on quality, technology, and innovative solutions for long-term client value.

Accounting 馃嚙馃嚜 Brussels 51,974 n/a
44
Avanadeavanade.com

Innovative provider of digital, cloud, and advisory services within the Microsoft ecosystem, focused on making a human impact, solving challenges, and promoting sustainability and diversity

IT Services and IT Consulting 馃嚭馃嚫 Seattle 50,000 2000
45
DEKRAdekra.com

DEKRA provides expert safety services worldwide, including vehicle inspection, claims services, industrial inspections, training, product certification, and sustainable solutions

Public Safety 馃嚛馃嚜 Stuttgart 49,000 n/a
46
NTT DATAnttdata.com

Providing IT and business consulting, digital transformation, managed services, and industry solutions to clients worldwide for long-term success.

IT Services and IT Consulting 馃嚡馃嚨 Tokyo 48,385 n/a
47
Sopra Steriasoprasteria.com

Offers consulting, digital services, and solutions, assisting large companies and organizations with digital transformation, improving competitiveness through technology and collaboration.

IT Services and IT Consulting 馃嚝馃嚪 Paris 47,609 n/a
48
Edward Jonesedwardjones.com

Provides personalized financial advisory and investment services through a large network of advisors to help clients achieve financial goals.

Financial Services 馃嚭馃嚫 St. Louis 45,845 1922
49
Minsaitminsait.com

A leading Spanish technological consultant operating globally, leveraging cloud, security, payments, and innovative technology to drive business and societal impact #MoreMinsait

IT Services and IT Consulting 馃嚜馃嚫 Alcobendas 45,000 2016
50
Capgemini Engineeringcapgemini.com

Engineering R&D services, combining broad industry knowledge and cutting-edge digital and software technologies to accelerate clients' journey towards Intelligent Industry.

Engineering Services 馃嚝馃嚪 Paris 44,836 n/a

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51
C.S

The company does amazing things. These amazing things happen daily. They are involved in many amazing projects and activities.

IT Services and IT Consulting 馃嚭馃嚫 Global 44,000 1959
52
Arcadisarcadis.com

delivering transformative projects globally addressing climate, energy, and livable cities through design, engineering, architecture, and consulting for a better future

Professional Services 馃嚦馃嚤 Amsterdam 42,295 n/a
53
Mazarsforvismazars.com

Global integrated partnership providing audit, accountancy, advisory, tax, and legal services through fifty thousand professionals across more than one hundred countries worldwide.

Accounting 馃嚝馃嚪 Paris La Defense 42,000 1945
54
L&T Technology Servicesltts.com

Provides engineering and technology services globally, supporting product design, development, and delivery across diverse industries with innovation.

Engineering Services 馃嚠馃嚦 Vadodara 41,420 n/a
55
Publicis Groupepublicisgroupe.com

Helps clients transform their marketing and digital businesses, providing expertise in communications, media, data, and technology across 100+ countries.

Advertising Services 馃嚝馃嚪 Paris 41,020 n/a
56
Boston Consulting Group (BCG)bcg.com

A global management consulting firm that partners with organizations to tackle challenges, drive growth, and create positive societal impact through innovative solutions

Business Consulting and Services 馃嚭馃嚫 Boston 40,412 1963
57
Marsh McLennancorporate.marsh.com

Provides risk management, strategic consulting, and human resources solutions to clients worldwide, enhancing their ability to navigate challenges and seize opportunities.

Professional Services 馃嚭馃嚫 New York 40,340 1871
58
Conduentconduent.com

Digital business solutions provider leveraging cloud computing, AI, and automation to enhance client operations, improve customer experiences, and drive efficiencies

Business Consulting and Services 馃嚭馃嚫 Florham Park 38,990 2017
59
ALTENalten.com

Provides engineering and IT services, supporting businesses in technological and sustainable transformation across various industries with high-level consultant-engineers.

Engineering Services 馃嚝馃嚪 Boulogne-Billancourt 38,710 1988
60
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
61
Booz Allen Hamiltonboozallen.com

Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future

Software Development 馃嚭馃嚫 McLean 37,244 1914
62
Leidosleidos.com

Global technology leader providing digital mission innovations and efficient technical services for government and commercial customers through a diverse, flexible work environment.

Defense and Space Manufacturing 馃嚭馃嚫 Reston 37,171 1969
63
SAICbit.ly

Advanced technology mission integrator delivering secure high-end solutions in mission IT, enterprise IT, engineering, and professional services for defense, space, and intelligence.

Defense and Space Manufacturing 馃嚭馃嚫 Reston 36,645 1969
64
Fluor Corporationfluor.com

Global EPC company providing engineering solutions to energy, infrastructure, life sciences, technology, mining, and government sectors with emphasis on innovation and sustainability

Construction 馃嚭馃嚫 Irving 36,512 1912
65
Escrit贸rio de Advocacia

Legal services provided by a law office specializing in advocacy and legal representation

Law Practice 馃嚙馃嚪 Bel茅m 35,758 n/a
66
GlobalLogicgloballogic.com

A global product development services leader, combining software engineering expertise and industry experience to help customers design and deliver next-generation products and digital experiences

Software Development 馃嚭馃嚫 Santa Clara 35,494 n/a
67
ICON plciconplc.com

A global company founded in Ireland in 1990, specializing in accelerating the development of drugs and devices to save lives and improve quality of life

Biotechnology Research 馃嚠馃嚜 Dublin 35,001 n/a
68
VMLvml.com

Global creative agency combining brand experience, customer experience, and commerce with deep data and technology expertise for clients.

Advertising Services 馃嚭馃嚫 New York 34,192 n/a
69
Quess Corp Limitedquesscorp.com

An integrated business service provider offering technology-enabled staffing and managed outsourcing services to create a more productive workforce and drive success for clients

Staffing and Recruiting 馃嚠馃嚦 Bengaluru 33,670 2007
70
Bechtel Corporationbechtel.com

Engineering, construction, and project management services for energy, infrastructure, manufacturing, mining, and nuclear markets worldwide, delivering successful outcomes.

Construction 馃嚭馃嚫 Reston 33,626 1898
71
Deloitte India (Offices of the US)deloitte.com

A region within a global organization providing professional services in India to their US-based parent companies across various sectors

Management Consulting 馃嚠馃嚦 Hyderabad 33,190 1895
72
Sercoserco.com

Innovative solutions for global challenges in justice, migration, defense, space, health, and transport through service design, program management, and systems integration

IT Services and IT Consulting 馃嚞馃嚙 Hook 32,618 n/a
73
NTT DATA Europe & Latamnttdata.com

Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future

IT Services and IT Consulting 馃嚜馃嚫 Madrid 31,932 n/a
74
Hayshaysplc.com

Specialist recruitment and workforce solutions provider offering advisory services, career transitions, and employer brand positioning, with a focus on empowering people and businesses to succeed globally

Staffing and Recruiting 馃嚞馃嚙 London 31,854 n/a
75
KBR, Inc.kbr.com

Providing science, technology, and engineering solutions to governments and companies worldwide addressing significant contemporary challenges and opportunities.

IT Services and IT Consulting 馃嚭馃嚫 Houston 31,433 n/a
76
KPMG Indiasocial.kpmg

Provides industry-tailored, technology-enabled business advisory services to over 2700 companies across 14 Indian cities, leveraging local professionals and global service delivery.

Business Consulting and Services 馃嚠馃嚦 Gurugram 31,247 n/a
77
Manpowermanpower.com

Global leader in contingent and permanent recruitment, providing agile staffing solutions and access to a deep talent pool for businesses.

Staffing and Recruiting 馃嚭馃嚫 Milwaukee 30,000 1948
78
Collierscolliers.com

Offers real estate services, engineering solutions, and investment management, focusing on client success and delivering strong financial returns.

Real Estate 馃嚚馃嚘 Toronto 29,561 n/a
79
PwC Indiapwc.in

Professional services network providing audit, tax, legal, deals, and consulting to help clients build trust and competitive advantage.

Business Consulting and Services 馃嚠馃嚦 Kolkata 28,584 n/a
80
Globantglobant.com

A digitally native company specializing in helping organizations innovate and unleash potential, with a focus on diversity, inclusion, and cybersecurity

IT Services and IT Consulting 馃嚭馃嚫 San Francisco 28,419 n/a
81
TEKsystemsteksystems.com

Global solutions provider specializing in accelerating business transformation through resolving technology, business, and talent challenges for Fortune 500 organizations

IT Services and IT Consulting 馃嚭馃嚫 Hanover 28,131 1983
82
Tetra Techtetratech.com

A global provider of consulting and engineering services, specializing in innovative technical solutions for water, environment, infrastructure, energy, and international development projects

Civil Engineering 馃嚭馃嚫 Pasadena 27,460 n/a
83
Webhelpwebhelp.com

The company specializes in creating innovative customer journeys using data insights, AI, and human talent to drive growth for brands worldwide

Outsourcing and Offshoring Consulting 馃嚝馃嚪 Paris 27,162 n/a
84
Robert Halfroberthalf.com

Connecting skilled professionals with companies through contract, temporary, and permanent placements in finance, technology, marketing, legal, and administrative sectors.

Staffing and Recruiting 馃嚭馃嚫 Menlo Park 26,429 1948
85
Aruparup.com

A global collective of designers and consultants dedicated to sustainable development, collaborating with clients to shape a better world using technology and imagination

Design Services 馃嚞馃嚙 London 26,193 1946
86
Marsh Riskmarsh.com

A global leader in insurance brokerage and risk advisory, providing data-driven solutions and advisory services to clients worldwide

Insurance 馃嚭馃嚫 New York 26,000 n/a
87
Capitacapita.com

A leading provider of business services using data, technology, and people to simplify connections between governments, citizens, businesses, and customers

IT Services and IT Consulting 馃嚞馃嚙 London 25,581 1984
88
LHHlhh.com

Global HR solutions provider offering advisory, career transition, leadership development, and recruitment services to organizations and individuals worldwide.

Human Resources Services 馃嚭馃嚫 Jacksonville 25,394 n/a
89
Mercer Espa帽amercer.com

Mercer is a global consultancy business focused on providing trusted advice and solutions to help organizations build brighter, healthier, and more sustainable futures

Professional Training and Coaching 馃嚭馃嚫 New York 25,000 1945
90
Kantarkantar.com

Global leader in marketing data and analytics with deep expertise, innovative technology, and insights to help clients understand people and drive growth worldwide

Market Research 馃嚞馃嚙 London 24,976 n/a
91
Eurofinseurofins.com

An international life sciences company offering analytical testing services in food, environmental, pharmaceutical, and cosmetic industries, ensuring safety and authenticity

Biotechnology Research 馃嚤馃嚭 Luxembourg 24,896 n/a
92
Mott MacDonaldmottmac.com

The company focuses on improving society through digital innovation, excellence, and solving intricate challenges with clients to deliver better outcomes

Civil Engineering 馃嚞馃嚙 London 24,653 1989
93
Wipro Ltd. - Indiawipro.com

A leading provider of IT services leveraging technology solutions to enable business transformation, aligning IT strategies with business goals

IT Services and IT Consulting 馃嚠馃嚦 Bengaluru 24,515 1945
94
Publicis Sapientpublicissapient.com

A digital business transformation partner, specializing in strategy, product, experience, engineering, data, and delivering impactful solutions to global organizations

Business Consulting and Services 馃嚭馃嚫 Boston 24,251 n/a
95
Bain & Companybain.com

Global consultancy aiding ambitious change makers define the future, achieving extraordinary results, outperforming competition, redefining industries, and tackling urgent societal challenges.

Business Consulting and Services 馃嚭馃嚫 Boston 23,729 n/a
96
Syneos Healthsyneoshealth.com

A leading biopharmaceutical solutions organization driving customer success by translating clinical, medical, and commercial insights into outcomes worldwide Promoting inclusivity and sustainability

Biotechnology Research 馃嚭馃嚫 Morrisville 23,569 n/a
97
Unisysunisys.com

A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations

IT Services and IT Consulting 馃嚭馃嚫 Blue Bell 23,358 n/a
98
Sedgwicksedgwick.com

A global provider of risk, benefits, and business solutions, offering tailored resources to help organizations with health, claims, brand protection, and business continuity

Insurance 馃嚭馃嚫 23,170 1969
99
Swecoswecogroup.com

A leading consultancy co-creating sustainable solutions for urban areas through planning, design, and digital innovation with a team of 21,000 specialists

Professional Services 馃嚫馃嚜 Stockholm 22,591 n/a
100
Parexelparexel.com

Provides comprehensive clinical development services globally, from early to late phase trials, helping new treatments reach patients faster through expertise and innovation.

Pharmaceutical Manufacturing 馃嚭馃嚫 Raleigh 21,982 1982

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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 12, 2026.

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