This selection of professional services firms in the United States includes some of the largest global players in consulting, IT services, and real estate. Companies like Deloitte, a global professional services firm, and KPMG, offering audit, tax, and advisory services, represent the traditional consulting sector. IT services are prominent with Concentrix, which provides customer experience solutions, and Kyndryl, a leader in managing advanced technology infrastructure. JLL and CBRE specialize in real estate and investment management.
The data shows a concentration of headquarters in major US cities, particularly New York, which hosts Genpact, Goldman Sachs, Kyndryl, and WNS. Other significant hubs include Dallas, with JLL and Jacobs, and Chicago, home to JLL. The firms span a wide range of founding dates, from Deloitte (1845) and ManpowerGroup (1948) to more recent establishments like DXC Technology (2017) and Kyndryl (2021), indicating a mix of long-established enterprises and newer entities.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Deloittedeloitte.com
Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity |
526,765 | |||
| 2 | 265,000 | ||||
| 3 |
Concentrixconcentrix.com
Provides customer experience solutions and technology, improving business performance for global brands across various industries, creating better business outcomes. |
218,681 | |||
| 4 |
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 |
151,199 | |||
| 5 | 104,899 | ||||
| 6 |
Allied Universalaus.com
Provides tailored security and facility services using smart technology, supporting diverse sectors with local leadership and community presence. |
104,797 | |||
| 7 |
DXC Technologydxc.com
It assists global companies in managing critical systems, modernizing IT, optimizing data, and ensuring security across various cloud environments. |
90,597 | |||
| 8 |
Kyndrylkyndryl.com
A global leader in designing, running, and managing advanced technology infrastructure, focusing on excellence, innovation, and advancing vital systems for human progress |
90,000 | |||
| 9 |
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. |
76,000 | |||
| 10 | 75,008 | ||||
| 11 |
ManpowerGroupmanpowergroup.com
Global workforce solutions company sourcing, assessing, and managing talent for organizations worldwide, while providing sustainable employment opportunities across various industries and skills |
72,454 | |||
| 12 |
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. |
68,461 | |||
| 13 |
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. |
68,303 | |||
| 14 |
EPAM Systemsepam.com
Global digital transformation services provider specializing in product development and engineering, creating better enterprise, education, and health platforms worldwide |
66,049 | |||
| 15 | 61,367 | ||||
| 16 |
Halliburtonhalliburton.com
Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production. |
60,277 | |||
| 17 |
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 |
58,974 | |||
| 18 | 57,963 | ||||
| 19 |
Aramarkaramark.com
Global hospitality service provider delivering food and facilities management to educational institutions, healthcare providers, sports teams, and municipalities across sixteen countries worldwide. |
56,723 | |||
| 20 |
Restaurantegonzaloveci.com
A restaurant located in San Pedro Sula, offering food and dining services to customers in the area |
53,004 | |||
| 21 |
Cushman & Wakefieldcushmanwakefield.com
Global commercial real estate services provider with 52,000 professionals focused on advancing client, colleague, and community outcomes worldwide. |
53,000 | |||
| 22 |
Gallaghergallagher.com
Global insurance brokerage offering risk management, consulting, employee benefits, claims management, and retirement services to protect assets and support clients. |
52,767 | |||
| 23 |
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 |
50,000 | |||
| 24 |
Edward Jonesedwardjones.com
Provides personalized financial advisory and investment services through a large network of advisors to help clients achieve financial goals. |
45,845 | |||
| 25 |
C.S
The company does amazing things. These amazing things happen daily. They are involved in many amazing projects and activities. |
44,000 | |||
| 26 |
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 |
40,412 | |||
| 27 |
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. |
40,340 | |||
| 28 |
Conduentconduent.com
Digital business solutions provider leveraging cloud computing, AI, and automation to enhance client operations, improve customer experiences, and drive efficiencies |
38,990 | |||
| 29 |
Booz Allen Hamiltonboozallen.com
Innovative technology consulting firm advancing critical missions through AI, cybersecurity, and engineering solutions, empowering clients to shape the future |
37,244 | |||
| 30 |
Leidosleidos.com
Global technology leader providing digital mission innovations and efficient technical services for government and commercial customers through a diverse, flexible work environment. |
37,171 | |||
| 31 | 36,645 | ||||
| 32 |
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 |
36,512 | |||
| 33 |
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 |
35,494 | |||
| 34 | 34,192 | ||||
| 35 |
Bechtel Corporationbechtel.com
Engineering, construction, and project management services for energy, infrastructure, manufacturing, mining, and nuclear markets worldwide, delivering successful outcomes. |
33,626 | |||
| 36 | 31,433 | ||||
| 37 |
Manpowermanpower.com
Global leader in contingent and permanent recruitment, providing agile staffing solutions and access to a deep talent pool for businesses. |
30,000 | |||
| 38 |
Globantglobant.com
A digitally native company specializing in helping organizations innovate and unleash potential, with a focus on diversity, inclusion, and cybersecurity |
28,419 | |||
| 39 |
TEKsystemsteksystems.com
Global solutions provider specializing in accelerating business transformation through resolving technology, business, and talent challenges for Fortune 500 organizations |
28,131 | |||
| 40 |
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 |
27,460 | |||
| 41 |
Robert Halfroberthalf.com
Connecting skilled professionals with companies through contract, temporary, and permanent placements in finance, technology, marketing, legal, and administrative sectors. |
26,429 | |||
| 42 |
Marsh Riskmarsh.com
A global leader in insurance brokerage and risk advisory, providing data-driven solutions and advisory services to clients worldwide |
26,000 | |||
| 43 | 25,394 | ||||
| 44 |
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 |
25,000 | |||
| 45 |
Publicis Sapientpublicissapient.com
A digital business transformation partner, specializing in strategy, product, experience, engineering, data, and delivering impactful solutions to global organizations |
24,251 | |||
| 46 |
Bain & Companybain.com
Global consultancy aiding ambitious change makers define the future, achieving extraordinary results, outperforming competition, redefining industries, and tackling urgent societal challenges. |
23,729 | |||
| 47 |
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 |
23,569 | |||
| 48 |
Unisysunisys.com
A global technology solutions company offering digital workplace, cloud, applications & infrastructure, enterprise computing, and business process solutions to empower organizations |
23,358 | |||
| 49 |
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 |
23,170 | |||
| 50 |
Parexelparexel.com
Provides comprehensive clinical development services globally, from early to late phase trials, helping new treatments reach patients faster through expertise and innovation. |
21,982 | |||
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 |
Korn Ferrykornferry.com
It is a global consulting firm specializing in organizational design, hiring, workforce motivation, and professional development for career advancement. |
21,328 | |||
| 52 | 20,860 | ||||
| 53 |
Parsons Corporationparsons.com
A digitally enabled solutions provider creating future defense, intelligence, and critical infrastructure solutions with an agile and innovative approach |
20,710 | |||
| 54 |
Aerotekaerotek.com
Aerotek provides staffing and services solutions for various industries, helping companies and careers evolve to overcome challenges in North American industry |
20,490 | |||
| 55 | 20,440 | ||||
| 56 |
CBRE Global Workplace Solutions (GWS)cbre.com
Partner with clients worldwide to deliver tailored workplace solutions addressing unique organizational needs and driving strategic business outcomes. |
20,430 | |||
| 57 |
Kellykellyservices.com
A pioneering staffing company connecting over 450,000 individuals with work annually, leveraging expertise in various industries since 1946 |
20,231 | |||
| 58 |
Amergis Healthcare Staffingamergis.com
Healthcare staffing agency offering opportunities and solutions for various healthcare professionals and organizations with a personalized approach and exceptional service |
19,829 | |||
| 59 |
RSM US LLPrsmus.com
Provider of assurance, tax, and consulting services focused on middle market clients with a global presence and professional development culture. |
19,700 | |||
| 60 |
Sagilitysagility.com
A global provider of technology-driven healthcare solutions, specializing in business process management, customer experience, member engagement, and analytics for positive outcomes |
19,592 | |||
| 61 |
Insightinsight.com
A Fortune 500 solutions integrator specializing in accelerating digital transformation, modernizing businesses, and maximizing technology value through deep partnerships |
19,219 | |||
| 62 | 18,732 | ||||
| 63 |
Freelance (Self employed)setmore.com
Community of independent professionals, creators, and self-employed individuals helping people overcome challenges, remove bottlenecks, and focus on what truly matters. |
18,205 | |||
| 64 |
Virtusavirtusa.com
Digital engineering and technology services provider for Forbes Global 2000 companies worldwide, focusing on innovative solutions and impactful results through an "Engineering First" approach |
18,045 | |||
| 65 |
Infosys Ltdinfosys.com
Global leader in next-generation digital services and consulting, enabling clients worldwide to navigate digital transformation with AI-powered solutions and agile digital delivery for performance and customer satisfaction |
17,979 | |||
| 66 |
Gi Groupgigroup.com
Providing temporary, permanent, professional staffing, executive search, outsourcing, training, outplacement, and HR consultancy services worldwide across multiple industries. |
17,915 | |||
| 67 |
TransPerfecttransperfect.com
A global leader in language services and technologies, helping businesses expand internationally through translation, localization, multicultural marketing, interpretation, and more |
17,809 | |||
| 68 |
HDRhdrinc.com
Employee-owned design firm offering engineering, architecture, environmental, and construction services Top-ranked globally, specializing in healthcare design with a focus on collaboration and career growth |
17,540 | |||
| 69 |
Wipro Technologieswipro.com
Management consulting company located in New Orleans, providing services to help businesses improve operations and achieve their goals |
16,942 | |||
| 70 |
Burns & McDonnellburnsmcd.com
Engineering, construction, architecture, planning, and community engagement with a strong ownership mentality and commitment to client success and safety. |
16,200 | |||
| 71 |
HUB Internationalhubinternational.com
Advises businesses and individuals on insurance, risk management, employee benefits, retirement, and wealth management with tailored solutions. |
16,129 | |||
| 72 |
Guidehouseguidehouse.com
Global AI-led professional services firm providing advisory, technology, and managed services to commercial and government sectors for efficiency and resilience. |
15,865 | |||
| 73 |
Wells Fargo Advisorswellsfargoadvisors.com
Financial advisors providing professional investment guidance and wealth management services across fifty states to help clients achieve long-term success through complex planning. |
14,935 | |||
| 74 |
Locktonglobal.lockton.com
Private ownership enabling independent focus on clients' risk and insurance needs with global expertise and remarkable results. |
14,780 | |||
| 75 |
Marsh McLennan Agencymarshmma.com
Provides business insurance, employee health benefits, retirement planning, and private client insurance with personalized local service and global expertise. |
14,684 | |||
| 76 |
Synechronsynechron.com
Innovative consulting firm leveraging digital technology to deliver leading solutions in AI, digital, cloud, data, and software engineering for financial services and technology industries globally |
14,671 | |||
| 77 |
UL Solutionsul.com
Global provider of safety testing, certification, inspection, auditing, and advisory services ensuring product security, sustainability, and market trust. |
14,487 | |||
| 78 |
Express Employment Internationalexpresspros.com
International staffing company supporting franchise locations worldwide, providing staffing and HR services to connect individuals with jobs and businesses with employees |
14,211 | |||
| 79 |
PwC Acceleration Centerspwc.com
Global talent hubs delivering digital, innovative, and collaborative client support across multiple countries, enhancing quality and driving new ways of working. |
14,116 | |||
| 80 |
Alvarez & Marsalalvarezandmarsal.com
Global professional services firm specializing in business transformation, restructuring, performance improvement, and delivering practical solutions for complex organizational challenges. |
14,064 | |||
| 81 |
Apex Systemsapexsystems.com
Specializes in strategy, transformation, managed services including application development, data, cloud, cybersecurity, and AI solutions across global markets. |
13,945 | |||
| 82 |
Protivitiprotiviti.com
Global consulting firm offering expertise in finance, technology, operations, data, digital, legal, HR, risk, and internal audit to help clients navigate future challenges |
13,479 | |||
| 83 |
Movatemovate.com
A digital technology and customer experience services company focused on innovation and client outcomes, with a global network of diverse talent |
13,112 | |||
| 84 | 12,940 | ||||
| 85 |
Thoughtworksthoughtworks.com
A global technology consultancy specializing in strategy, design, and engineering to drive digital innovation, fostering diverse talent and a strong cultivation culture |
12,735 | |||
| 86 | 12,544 | ||||
| 87 |
TrueBlue Inc.trueblue.com
Staffing, recruiting, and workforce management services for diverse industries, providing reliable and efficient workforce solutions daily. |
12,447 | |||
| 88 | 12,228 | ||||
| 89 |
Dentonsdentons.com
Global law firm in 80+ countries offers legal solutions for clients to grow, protect, operate, and finance, emphasizing diversity, inclusion, and sustainability |
12,002 | |||
| 90 |
Baker McKenziebakermckenzie.com
Provide practical legal advice combining local knowledge and international expertise to help businesses succeed across global markets. |
11,895 | |||
| 91 |
Black & Veatchbv.com
An employee-owned global leader in building critical human infrastructure in Energy, Water, Telecommunications, and Government Services since 1915 |
11,691 | |||
| 92 |
Grant Thornton (US)grantthornton.com
Provides independent audit, tax, and advisory services through a global network, focusing on quality, trust, and strong client relationships. |
11,518 | |||
| 93 |
Fortreafortrea.com
A global provider of clinical development and patient access solutions, specializing in accelerating life-changing therapies to patients through innovative trial management services |
11,430 | |||
| 94 |
Propio Language Servicespropio.com
Providing technology-driven interpreting, translation, and localization services. Ensuring Limited English Proficient speakers access essential services through certified, ethical interpreters. |
11,345 | |||
| 95 | 11,182 | ||||
| 96 | 11,084 | ||||
| 97 | 10,724 | ||||
| 98 |
USI Insurance Servicesusi.com
A global insurance brokerage and consulting firm offering property & casualty, employee benefits, personal risk, and retirement solutions for businesses and individuals |
10,717 | |||
| 99 |
Randstad USArandstadusa.com
Provides staffing, recruitment, outsourcing, consulting, and workforce management solutions across various industries in the U.S. and Canada. |
10,638 | |||
| 100 |
Baker Tilly USbakertilly.com
A leading advisory CPA firm with a coast-to-coast and global presence, part of Baker Tilly International network with 43,000 professionals |
10,594 | |||
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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.
More company lists in the United States
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- Manufacturers in the United States 8,678
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The same list elsewhere in United States
- Professional services firms in New York State 955
- Professional services firms in California 880
- Professional services firms in Texas 629
- Professional services firms in Florida 375
- Professional services firms in Virginia 344
- Professional services firms in Illinois 339
- Professional services firms in Massachusetts 249
- Professional services firms in New Jersey 249
- Professional services firms in Georgia 246
- Professional services firms in Pennsylvania 245
- Professional services firms in Ohio 195
- Professional services firms in Maryland 176
- Professional services firms in Michigan 172
- Professional services firms in Washington State 163
- Professional services firms in North Carolina 142
- Professional services firms in Alabama 135
- Professional services firms in Minnesota 125
- Professional services firms in New York 735
- Professional services firms in Chicago 196
- Professional services firms in Houston 156
- Professional services firms in Atlanta 143
- Professional services firms in San Francisco 130
- Professional services firms in Washington 109
- Professional services firms in Los Angeles 108