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List of professional services firms in New York State

Tamtam tracks 955 professional services firms headquartered in New York State. This list ranks the 100 largest by number of employees on LinkedIn, led by Genpact, Kyndryl and Goldman Sachs. Their median headcount is 3,888. Half of them were founded in 1979 or later. The most common headquarters are New York (93).

馃嚭馃嚫 New York State100 companiesUpdated Nov 11, 2026

The companies listed are large professional services firms based in New York State, predominantly in New York City. They operate across various sectors, including business consulting, financial services, IT consulting, and insurance. Many of these firms were founded in the late 20th or early 21st century, indicating a period of growth in these industries.

Key examples include Genpact, specializing in digital operations and AI solutions, and Kyndryl, a global leader in advanced technology infrastructure. Goldman Sachs provides capital markets and asset management services, while WNS focuses on digital-led business transformation. Marsh McLennan offers risk management and strategic consulting, and VML is a global creative agency.

#CompanyIndustryHeadquarters EmployeesFounded
1
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
2
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
3
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
4
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
5
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
6
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
7
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
8
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
9
TransPerfecttransperfect.com

A global leader in language services and technologies, helping businesses expand internationally through translation, localization, multicultural marketing, interpretation, and more

Translation and Localization 馃嚭馃嚫 New York 17,809 1992
10
Marsh McLennan Agencymarshmma.com

Provides business insurance, employee health benefits, retirement planning, and private client insurance with personalized local service and global expertise.

Insurance 馃嚭馃嚫 White Plains 14,684 n/a
11
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

Technology, Information and Internet 馃嚭馃嚫 New York 14,671 2001
12
Alvarez & Marsalalvarezandmarsal.com

Global professional services firm specializing in business transformation, restructuring, performance improvement, and delivering practical solutions for complex organizational challenges.

Business Consulting and Services 馃嚭馃嚫 New York 14,064 n/a
13
Marshmarsh.com

provides risk management, strategy consulting, and people advisory services to clients worldwide across multiple specialized business units

Professional Services 馃嚭馃嚫 New York 12,940 n/a
14
GLGglg.com

Connecting decision makers with experts for true clarity and insights to make informed decisions and stay ahead in their profession Visit website for more details

Information Services 馃嚭馃嚫 New York 12,228 1998
15
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

Insurance 馃嚭馃嚫 Valhalla 10,717 1994
16
WSP in the U.S.wsp.com

This professional services consulting firm plans, advises, designs, manages, and engineers sustainable solutions that shape communities for future generations to thrive

Professional Services 馃嚭馃嚫 New York 10,588 n/a
17
Accenture Songaccenture.com

This company is the world's largest creative group powered by technology, offering innovative solutions to clients

Marketing Services 馃嚭馃嚫 New York 10,047 n/a
18
Oliver Wymanoliverwyman.com

Provide strategic advice and collaborative consulting to help clients navigate critical decisions and transformative changes for growth and success.

Business Consulting and Services 馃嚭馃嚫 New York 9,772 n/a
19
IPG Mediabrandsomnicommedia.com

manages global marketing investments through full-service agencies and specialty units, serving diverse industries with media and marketing solutions

Advertising Services 馃嚭馃嚫 New York 8,776 n/a
20
CI&Tciandt.com

AI-powered digital solutions provider partnering with top brands to drive business transformation through strategic innovation and scalable solutions

IT Services and IT Consulting 馃嚭馃嚫 New York 8,592 1995
21
Data Entry Job (Remote Job)omnilabes.com

This company specializes in hiring remote data entry clerks They are currently looking to fill positions in this field

Software Development 馃嚭馃嚫 New York 8,442 n/a
22
White & Case LLPwhitecase.com

Global law firm providing cross-border legal services with local expertise, innovative solutions, and client-focused guidance for complex issues.

Law Practice 馃嚭馃嚫 New York 8,237 1901
23
Epiqepiqglobal.com

Provides technology-enabled services for corporate counsel, law firms, and business professionals, streamlining administration of legal department, business operations, eDiscovery, and regulatory matters.

Law Practice 馃嚭馃嚫 New York 8,206 1988
24
Omnicomomc.com

Global marketing communications company offering integrated marketing services for 200+ brands worldwide, known for talent, creativity, and digital innovation

Advertising Services 馃嚭馃嚫 New York 8,062 n/a
25
Jefferiesjefferies.com

Global full-service investment banking and capital markets firm providing advisory, sales, trading, research, wealth and asset management services to investors, companies and governments.

Investment Banking 馃嚭馃嚫 New York 8,019 1962
26
Newmarknmrk.com

Advisory and service provider for commercial real estate, serving institutional investors, corporations, owners, and occupiers worldwide with tailored solutions.

Real Estate 馃嚭馃嚫 New York 7,201 1929
27
Krollkroll.com

Leading provider of risk and financial advisory solutions, offering insights, data, and technology to help clients navigate complex demands and gain competitive advantage

Business Consulting and Services 馃嚭馃嚫 New York 7,199 n/a
28
Any Studiosanystudios.com

The company specializes in creating brand stories through strategic design and high-quality production services

Design Services 馃嚭馃嚫 New York 7,103 2015
29
Brown Brothers Harrimanbbh.com

Global financial services firm providing investor services, asset servicing, investment management, private equity, corporate advisory, and banking solutions worldwide.

Financial Services 馃嚭馃嚫 New York 6,819 1818
30
Fragomenfragomen.com

Provides comprehensive immigration legal services and technology solutions to corporate, academic, nonprofit, and individual clients globally.

Law Practice 馃嚭馃嚫 New York 6,656 1951
31
Apollo Global Management, Inc.apollo.com

Global alternative asset manager providing excess returns across risk-reward spectrum from investment grade credit to private equity and specialized retirement savings products.

Financial Services 馃嚭馃嚫 New York 5,845 1990
32
Greenberg Traurig, LLPgtlaw.com

A global law firm with 2750+ attorneys, recognized for client service, diversity, innovation, pro bono work, and commitment to renewable energy and philanthropy

Law Practice 馃嚭馃嚫 New York 5,767 1967
33
Welocalizewelocalize.com

A global leader in localized content solutions, leveraging innovative technology and a network of linguistic experts to drive business outcomes worldwide

Translation and Localization 馃嚭馃嚫 New York 5,734 1997
34
Strategy&strategyand.pwc.com

Providing visionary yet pragmatic strategy consulting services, we help clients solve tough problems through executable strategies resulting in measurable and sustainable outcomes

Business Consulting and Services 馃嚭馃嚫 New York 5,717 2014
35
Inizioinizio.com

Providing tailored, innovative solutions for health and life sciences companies to optimize clinical development, commercialization, and maximize patient access.

Business Consulting and Services 馃嚭馃嚫 New York 5,706 n/a
36
Invisible Technologiesinvisible.co

An operations innovation company leveraging AI, automation, and a global team to transform how companies are built and run more efficiently

Software Development 馃嚭馃嚫 New York 5,099 2015
37
Skadden, Arps, Slate, Meagher & Flom LLP and Affiliatesskadden.com

Provides innovative legal advice and solutions for complex transactions, litigation, regulatory matters, serving diverse clients globally with collaborative expertise.

Law Practice 馃嚭馃嚫 New York 4,946 1948
38
CohnReznickcohnreznick.com

Provides assurance, advisory, and tax services with deep industry knowledge to optimize performance, manage risk, and maximize value globally.

Accounting 馃嚭馃嚫 New York 4,923 1919
39
Havas Creative Networkhavascreative.com

Innovative global communications network offering custom solutions through a connected ecosystem of multidisciplinary teams, with access to entertainment and culture

Advertising Services 馃嚭馃嚫 New York 4,874 n/a
40
Guy Carpenterguycarp.com

specializes in global risk advisory and reinsurance brokerage, providing expert solutions to clients worldwide for managing complex risks.

Insurance 馃嚭馃嚫 New York 4,861 1922
41
NFP, an Aon companynfp.com

A global company offering specialized expertise in property & casualty brokering, benefits consulting, wealth management, and retirement plan advising Empowering clients with tailored solutions

Insurance 馃嚭馃嚫 New York 4,758 n/a
42
Presidiopresidio.com

A technology and innovation-driven company with expertise in automation, security, networking, digital transformation, and cloud computing, providing custom applications and managed services globally

IT Services and IT Consulting 馃嚭馃嚫 New York 4,355 n/a
43
24 Seven Talent24seventalent.com

A specialized recruitment agency building top full-time and freelance teams for leading brands in marketing, digital, creative, and technology sectors, with specialized subsidiaries supporting clients

Staffing and Recruiting 馃嚭馃嚫 New York 4,321 2000
44
STVstvinc.com

A professional services company specializing in transportation systems, building design, water systems, and other essential infrastructure for public and private sector clients

Civil Engineering 馃嚭馃嚫 New York 4,301 1912
45
Weber Shandwickwebershandwick.com

Global strategic communications agency specializing in earned media, creative brand strategies, and award-winning public relations services worldwide.

Public Relations and Communications Services 馃嚭馃嚫 New York 4,093 n/a
46
ReSource Proresourcepro.com

An insurance-focused business solutions company that integrates people, process, technology, and data analytics to help carriers, brokers, and MGAs improve profitability and efficiency

Insurance 馃嚭馃嚫 New York 4,073 2004
47
Bursonbursonglobal.com

Global communications firm specializing in reputation management to create competitive advantage and long-term value for clients worldwide.

Public Relations and Communications Services 馃嚭馃嚫 New York 3,922 n/a
48
AlixPartnersalixpartners.com

AlixPartners helps businesses globally with urgent challenges, specializing in performance improvement, transformation, restructuring, and risk mitigation through action-oriented, results-driven approaches

Business Consulting and Services 馃嚭馃嚫 New York 3,915 n/a
49
Simpson Thacher & Bartlett LLPstblaw.com

A leading international law firm with over 1,000 lawyers, providing legal advice and transactional services worldwide from its headquarters in New York

Law Practice 馃嚭馃嚫 New York 3,914 1884
50
Evercoreevercore.com

Global independent investment banking advisory firm providing mergers, acquisitions, restructuring, capital markets, equity research, and wealth management services to institutional and high-net-worth clients.

Investment Banking 馃嚭馃嚫 New York 3,888 1995

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51
Ropes & Gray LLPropesgray.com

A global law firm with approximately 1,500 lawyers serving clients in major business hubs, known for leading practices in various legal areas

Law Practice 馃嚭馃嚫 New York 3,647 n/a
52
The Legal Aid Societylegalaidnyc.org

Provide free legal services to low-income individuals, including criminal defense, civil legal services, and juvenile rights representation in Family Court

Law Practice 馃嚭馃嚫 New York 3,320 1876
53
Spark Foundrysparkfoundryww.com

A global media agency under Publicis Media, combining innovation with industry talent to deliver award-winning campaigns worldwide

Advertising Services 馃嚭馃嚫 New York 3,284 n/a
54
CTGctg.com

CTG accelerates digital transformation by offering innovative solutions and services to achieve business performance, data-driven decision making, and reimagined customer experiences

IT Services and IT Consulting 馃嚭馃嚫 Amherst 3,092 n/a
55
HOKhok.com

A global firm offering design, architecture, engineering, and planning services to create sustainable and innovative solutions for clients and communities

Architecture and Planning 馃嚭馃嚫 New York 3,080 1955
56
Oppenheimer & Co. Inc.oppenheimer.com

Provides wealth management, capital markets, and investment banking solutions, offering customized strategies to advance society and improve communities.

Financial Services 馃嚭馃嚫 New York 3,353 1881
57
Greygrey.com

Creative marketing agency delivering effective ideas and growth solutions for global brands through innovative advertising and business problem-solving strategies.

Advertising Services 馃嚭馃嚫 New York 2,957 1917
58
Weil, Gotshal & Manges LLPweil.com

With a history dating back to 1931, this firm offers top-tier legal services with over 1,100 lawyers across three continents Specializing in various practice areas

Law Practice 馃嚭馃嚫 New York 2,952 n/a
59
Citrin Coopermancitrincooperman.com

Professional services provider offering attest, tax, advisory, and business consulting services in an alternative practice structure as independent member firms of a global network

Professional Services 馃嚭馃嚫 New York 2,938 1979
60
Russell Reynolds Associatesrussellreynolds.com

Global consultants assisting public and private organizations with board effectiveness, executive assessment, and building transformational leadership teams to navigate complex business trends.

Business Consulting and Services 馃嚭馃嚫 New York 2,934 1969
61
Davis Polk & Wardwell LLPdavispolk.com

Global law firm providing sophisticated legal advice and practical solutions for complex business and legal challenges worldwide.

Law Practice 馃嚭馃嚫 New York 2,926 1849
62
Wilson Elserwilsonelser.com

A leading litigation defense law firm with over 1,000 attorneys nationwide handling over 100,000 defense and coverage matters in various courts

Law Practice 馃嚭馃嚫 New York 2,902 1978
63
Real Chemistryrealchemistry.com

The company enhances healthcare commercial success through AI-powered experiences, putting the customer at the center and aiming to transform healthcare

Advertising Services 馃嚭馃嚫 New York 2,858 n/a
64
Paul, Weiss, Rifkind, Wharton & Garrison LLPpaulweiss.com

A premier law firm with over 1,000 diverse lawyers providing innovative solutions for complex legal and business challenges to clients worldwide

Law Practice 馃嚭馃嚫 New York 2,838 1875
65
Cumming Groupcumming-group.com

Specializes in project, cost, and construction management services across multiple sectors, delivering tailored solutions globally through extensive expertise.

Construction 馃嚭馃嚫 New York 2,825 1996
66
FGS Globalfgsglobal.com

Global firm specializing in stakeholder strategy, enabling clients to lead, influence, and succeed during critical and decisive moments.

Business Consulting and Services 馃嚭馃嚫 New York 2,788 n/a
67
Cleary Gottlieb Steen & Hamilton LLPclearygottlieb.com

International law firm providing high-quality legal services with a focus on innovation, diversity, and client-centered solutions worldwide.

Law Practice 馃嚭馃嚫 New York 2,716 1946
68
Arcesiumarcesium.com

A leading fintech company providing advanced data, operations, and analytics platform for financial institutions, optimizing investment lifecycle with industry-specific capabilities

Software Development 馃嚭馃嚫 New York 2,704 2015
69
Cantor Fitzgeraldcantor.com

Global financial services firm specializing in equity and fixed income capital markets, investment banking, commercial real estate finance, and asset management technology.

Financial Services 馃嚭馃嚫 New York 2,655 n/a
70
WORKacwork.ac

Award-winning architecture firm focused on public, cultural, and civic projects worldwide, emphasizing social and environmental concerns through intelligent and playful design

Architecture and Planning 馃嚭馃嚫 New York 2,654 2003
71
Interpublic Group (IPG)omc.com

A values-based marketing solutions provider with globally recognized brands in advertising, communications, and data-driven creativity, generating over $10 billion in revenue

Advertising Services 馃嚭馃嚫 New York 2,620 n/a
72
Jackson Lewis P.C.jacksonlewis.com

A team of over 950 attorneys specializing in labor and employment law, providing proactive strategies and solutions to foster diverse and engaged workforces

Law Practice 馃嚭馃嚫 New York 2,592 1958
73
J.S. Held LLCjsheld.com

Global consulting firm providing expertise in technical, scientific, financial, and strategic matters to help clients realize value and mitigate risk worldwide

Business Consulting and Services 馃嚭馃嚫 Jericho 2,442 1974
74
Willkie Farr & Gallagher LLPwillkie.com

Provides innovative and sophisticated legal services across multiple industries and markets with a global team of approximately 1,300 lawyers.

Law Practice 馃嚭馃嚫 New York 2,420 1888
75
Axiomaxiomlaw.com

Innovative legal services provider offering cost-effective solutions for global legal departments across various industries with high client satisfaction

Law Practice 馃嚭馃嚫 New York 2,398 2000
76
Marlabsmarlabs.com

Delivers complex technology solutions through data engineering, advanced analytics, and digital product engineering to scale intelligent solutions for diverse Fortune 500 industries.

Business Consulting and Services 馃嚭馃嚫 New York 2,345 1996
77
Hill & Knowltonhillandknowlton.com

providing strategic communications services worldwide, managing reputations, engaging stakeholders, and delivering innovative campaigns across diverse industries and sectors

Public Relations and Communications Services 馃嚭馃嚫 New York 2,276 n/a
78
Proskauer Rose LLPproskauer.com

A global law firm with 800+ lawyers offering strategic legal representation to leading organizations, corporations, and industry-redefining companies worldwide

Law Practice 馃嚭馃嚫 New York 2,269 1875
79
Hazen and Sawyerhazenandsawyer.com

A company focused on providing safe drinking water and controlling water pollution through planning, design, and construction management of water-related projects

Environmental Services 馃嚭馃嚫 New York 2,261 1951
80
Skidmore, Owings & Merrill (SOM)som.com

A leading design firm creating environmentally-advanced solutions for a better future, recognized for carbon neutrality and commitment to equality

Architecture and Planning 馃嚭馃嚫 New York 2,247 1936
81
UHY-USuhy-us.com

UHY provides audit, tax, consulting and advisory services to middle market clients, offering innovative solutions tailored to their business challenges globally

Accounting 馃嚭馃嚫 New York 2,223 n/a
82
Ankuraankura.com

Ankura Consulting Group provides expert services and solutions globally to help clients navigate critical challenges and opportunities in various areas

Business Consulting and Services 馃嚭馃嚫 New York 2,151 2014
83
Thornton Tomasettithorntontomasetti.com

The company applies scientific and engineering principles to solve various challenges in industries like building design and construction, with a focus on innovation

Design Services 馃嚭馃嚫 New York 2,145 1949
84
CHA Consulting, Inc.chasolutions.com

Innovative engineering consulting and construction management firm offering a wide range of planning, design, and project management services to clients in North America

Civil Engineering 馃嚭馃嚫 Albany 2,144 1952
85
Teneoteneo.com

Global CEO advisory firm providing integrated advisory services to Fortune 100 clients across strategic communications, financial transactions, management consulting, risk, and governance

Business Consulting and Services 馃嚭馃嚫 New York 2,094 n/a
86
Debevoise & Plimptondebevoise.com

A premier law firm with market-leading practices, global perspective, and strong New York roots, delivering effective solutions and distinctive collaboration to clients' legal challenges

Law Practice 馃嚭馃嚫 New York 2,089 n/a
87
Moelis & Companymoelis.com

Provides strategic financial advice and solutions to corporations, governments, and sponsors across mergers, restructurings, and capital markets worldwide.

Investment Banking 馃嚭馃嚫 New York 2,042 2007
88
Pride Globalprideglobal.com

An integrated human capital solutions firm with diverse HR services globally and a focus on treating stakeholders exceptionally

Human Resources Services 馃嚭馃嚫 New York 2,019 1983
89
Pillsbury Winthrop Shaw Pittman LLPpillsburylaw.com

International law firm focusing on technology & media, energy, financial services, and real estate & construction sectors Known for client service, collaboration, and commercial awareness

Law Practice 馃嚭馃嚫 New York 2,016 n/a
90
Ogilvy Public Relationsogilvypr.com

A global communications leader with over 85 offices worldwide, consistently recognized for creative excellence and innovative PR campaigns

Public Relations & Communications 馃嚭馃嚫 New York 1,999 1980
91
BIG - Bjarke Ingels Groupbig.dk

A global architecture firm based in multiple cities, specializing in innovative and pragmatic urban design, research, and development, with a focus on parental leave support

Architecture and Planning 馃嚭馃嚫 Brooklyn 1,994 2006
92
IBM iXibm.com

Global experience design partner, specialized in business, design, and technology to help companies create innovative experiences and products for customers and employees

IT Services and IT Consulting 馃嚭馃嚫 Armonk 1,952 n/a
93
SG Analyticssganalytics.com

Global consulting firm delivering data and AI solutions through research and technology for industries including capital markets, BFSI, and media sectors.

Business Consulting and Services 馃嚭馃嚫 New York 1,939 2007
94
BBDO Worldwidebbdo.com

Award-winning ad agency with global reach and passionate belief in creativity to drive brand growth through transformative consumer experiences

Advertising Services 馃嚭馃嚫 New York 1,913 1891
95
UnitedLexunitedlex.com

A data and professional services company helping law firms and legal departments innovate through digital solutions, compliance, and legal operations

Legal Services 馃嚭馃嚫 New York 1,899 2006
96
maisonmaisonthats.us

This company specializes in transforming and building brands through strategy, creative design, brand identity, copywriting, and website development

Advertising Services 馃嚭馃嚫 New York 1,890 2019
97
CT Corporationwolterskluwer.com

A global leader providing solutions for legal compliance, financial management, and corporate services to professionals and small businesses worldwide

Legal Services 馃嚭馃嚫 New York 1,877 1892
98
Materialmaterialplus.io

The company provides insights, marketing, and technology services to create customer-centric business models and experiences for brands and companies

Business Consulting and Services 馃嚭馃嚫 New York 1,852 1973
99
DRIVER Mediadriver.tv

An independent content production studio specializing in creating video content for leading brands with a focus on digital media and branded content distribution

Media Production 馃嚭馃嚫 New York 1,802 n/a
100
ACA Groupacaglobal.com

Provides governance, risk, and compliance advisory services alongside regulatory technology platforms to help financial institutions manage oversight, surveillance, and global reporting requirements.

Business Consulting and Services 馃嚭馃嚫 New York 1,766 2002

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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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