# 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).

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.

🇺🇸 New York State · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Genpact](https://www.tamtam.ai/c/genpact) (genpact.com)<br>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 | 🇺🇸 New York | 151,199 | 1997 |
| 2 | [Kyndryl](https://www.tamtam.ai/c/kyndryl) (kyndryl.com)<br>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 | 🇺🇸 New York | 90,000 | 2021 |
| 3 | [Goldman Sachs](https://www.tamtam.ai/c/goldman-sachs) (goldmansachs.com)<br>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 | 🇺🇸 New York | 76,000 |  |
| 4 | [WNS](https://www.tamtam.ai/c/wns) (wns.com)<br>Global provider of digital-led business transformation, combining industry knowledge, technology, analytics, and process expertise to deliver innovative solutions. | Business Consulting and Services | 🇺🇸 New York | 61,367 | 1996 |
| 5 | [EXL](https://www.tamtam.ai/c/exl) (exlservice.com)<br>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 | 🇺🇸 New York | 58,974 | 1999 |
| 6 | [Marsh McLennan](https://www.tamtam.ai/c/marsh-mclennan) (corporate.marsh.com)<br>Provides risk management, strategic consulting, and human resources solutions to clients worldwide, enhancing their ability to navigate challenges and seize opportunities. | Professional Services | 🇺🇸 New York | 40,340 | 1871 |
| 7 | [VML](https://www.tamtam.ai/c/vml) (vml.com)<br>Global creative agency combining brand experience, customer experience, and commerce with deep data and technology expertise for clients. | Advertising Services | 🇺🇸 New York | 34,192 |  |
| 8 | [Marsh Risk](https://www.tamtam.ai/c/marsh-risk) (marsh.com)<br>A global leader in insurance brokerage and risk advisory, providing data-driven solutions and advisory services to clients worldwide | Insurance | 🇺🇸 New York | 26,000 |  |
| 9 | [TransPerfect](https://www.tamtam.ai/c/transperfect) (transperfect.com)<br>A global leader in language services and technologies, helping businesses expand internationally through translation, localization, multicultural marketing, interpretation, and more | Translation and Localization | 🇺🇸 New York | 17,809 | 1992 |
| 10 | [Marsh McLennan Agency](https://www.tamtam.ai/c/marsh-mclennan-agency) (marshmma.com)<br>Provides business insurance, employee health benefits, retirement planning, and private client insurance with personalized local service and global expertise. | Insurance | 🇺🇸 White Plains | 14,684 |  |
| 11 | [Synechron](https://www.tamtam.ai/c/synechron) (synechron.com)<br>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 | 🇺🇸 New York | 14,671 | 2001 |
| 12 | [Alvarez & Marsal](https://www.tamtam.ai/c/alvarez-and-marsal) (alvarezandmarsal.com)<br>Global professional services firm specializing in business transformation, restructuring, performance improvement, and delivering practical solutions for complex organizational challenges. | Business Consulting and Services | 🇺🇸 New York | 14,064 |  |
| 13 | [Marsh](https://www.tamtam.ai/c/marsh) (marsh.com)<br>provides risk management, strategy consulting, and people advisory services to clients worldwide across multiple specialized business units | Professional Services | 🇺🇸 New York | 12,940 |  |
| 14 | [GLG](https://www.tamtam.ai/c/glg) (glg.com)<br>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 | 🇺🇸 New York | 12,228 | 1998 |
| 15 | [USI Insurance Services](https://www.tamtam.ai/c/usi-insurance-services) (usi.com)<br>A global insurance brokerage and consulting firm offering property & casualty, employee benefits, personal risk, and retirement solutions for businesses and individuals | Insurance | 🇺🇸 Valhalla | 10,717 | 1994 |
| 16 | [WSP in the U.S.](https://www.tamtam.ai/c/wsp-in-the-u-s) (wsp.com)<br>This professional services consulting firm plans, advises, designs, manages, and engineers sustainable solutions that shape communities for future generations to thrive | Professional Services | 🇺🇸 New York | 10,588 |  |
| 17 | [Accenture Song](https://www.tamtam.ai/c/accenture-song) (accenture.com)<br>This company is the world's largest creative group powered by technology, offering innovative solutions to clients | Marketing Services | 🇺🇸 New York | 10,047 |  |
| 18 | [Oliver Wyman](https://www.tamtam.ai/c/oliver-wyman) (oliverwyman.com)<br>Provide strategic advice and collaborative consulting to help clients navigate critical decisions and transformative changes for growth and success. | Business Consulting and Services | 🇺🇸 New York | 9,772 |  |
| 19 | [IPG Mediabrands](https://www.tamtam.ai/c/ipg-mediabrands) (omnicommedia.com)<br>manages global marketing investments through full-service agencies and specialty units, serving diverse industries with media and marketing solutions | Advertising Services | 🇺🇸 New York | 8,776 |  |
| 20 | [CI&T](https://www.tamtam.ai/c/ci-and-t) (ciandt.com)<br>AI-powered digital solutions provider partnering with top brands to drive business transformation through strategic innovation and scalable solutions | IT Services and IT Consulting | 🇺🇸 New York | 8,592 | 1995 |
| 21 | [Data Entry Job (Remote Job)](https://www.tamtam.ai/c/data-entry-job-remote-job) (omnilabes.com)<br>This company specializes in hiring remote data entry clerks They are currently looking to fill positions in this field | Software Development | 🇺🇸 New York | 8,442 |  |
| 22 | [White & Case LLP](https://www.tamtam.ai/c/white-and-case-llp) (whitecase.com)<br>Global law firm providing cross-border legal services with local expertise, innovative solutions, and client-focused guidance for complex issues. | Law Practice | 🇺🇸 New York | 8,237 | 1901 |
| 23 | [Epiq](https://www.tamtam.ai/c/epiq) (epiqglobal.com)<br>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 | 🇺🇸 New York | 8,206 | 1988 |
| 24 | [Omnicom](https://www.tamtam.ai/c/omnicom-new-york) (omc.com)<br>Global marketing communications company offering integrated marketing services for 200+ brands worldwide, known for talent, creativity, and digital innovation | Advertising Services | 🇺🇸 New York | 8,062 |  |
| 25 | [Jefferies](https://www.tamtam.ai/c/jefferies) (jefferies.com)<br>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 | 🇺🇸 New York | 8,019 | 1962 |
| 26 | [Newmark](https://www.tamtam.ai/c/newmark) (nmrk.com)<br>Advisory and service provider for commercial real estate, serving institutional investors, corporations, owners, and occupiers worldwide with tailored solutions. | Real Estate | 🇺🇸 New York | 7,201 | 1929 |
| 27 | [Kroll](https://www.tamtam.ai/c/kroll) (kroll.com)<br>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 | 🇺🇸 New York | 7,199 |  |
| 28 | [Any Studios](https://www.tamtam.ai/c/any-studios) (anystudios.com)<br>The company specializes in creating brand stories through strategic design and high-quality production services | Design Services | 🇺🇸 New York | 7,103 | 2015 |
| 29 | [Brown Brothers Harriman](https://www.tamtam.ai/c/brown-brothers-harriman) (bbh.com)<br>Global financial services firm providing investor services, asset servicing, investment management, private equity, corporate advisory, and banking solutions worldwide. | Financial Services | 🇺🇸 New York | 6,819 | 1818 |
| 30 | [Fragomen](https://www.tamtam.ai/c/fragomen) (fragomen.com)<br>Provides comprehensive immigration legal services and technology solutions to corporate, academic, nonprofit, and individual clients globally. | Law Practice | 🇺🇸 New York | 6,656 | 1951 |
| 31 | [Apollo Global Management, Inc.](https://www.tamtam.ai/c/apollo-global-management-inc) (apollo.com)<br>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 | 🇺🇸 New York | 5,845 | 1990 |
| 32 | [Greenberg Traurig, LLP](https://www.tamtam.ai/c/greenberg-traurig-llp) (gtlaw.com)<br>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 | 🇺🇸 New York | 5,767 | 1967 |
| 33 | [Welocalize](https://www.tamtam.ai/c/welocalize) (welocalize.com)<br>A global leader in localized content solutions, leveraging innovative technology and a network of linguistic experts to drive business outcomes worldwide | Translation and Localization | 🇺🇸 New York | 5,734 | 1997 |
| 34 | [Strategy&](https://www.tamtam.ai/c/strategy-and) (strategyand.pwc.com)<br>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 | 🇺🇸 New York | 5,717 | 2014 |
| 35 | [Inizio](https://www.tamtam.ai/c/inizio) (inizio.com)<br>Providing tailored, innovative solutions for health and life sciences companies to optimize clinical development, commercialization, and maximize patient access. | Business Consulting and Services | 🇺🇸 New York | 5,706 |  |
| 36 | [Invisible Technologies](https://www.tamtam.ai/c/invisible-technologies) (invisible.co)<br>An operations innovation company leveraging AI, automation, and a global team to transform how companies are built and run more efficiently | Software Development | 🇺🇸 New York | 5,099 | 2015 |
| 37 | [Skadden, Arps, Slate, Meagher & Flom LLP and Affiliates](https://www.tamtam.ai/c/skadden-arps-slate-meagher-and-flom-llp-and-affiliates) (skadden.com)<br>Provides innovative legal advice and solutions for complex transactions, litigation, regulatory matters, serving diverse clients globally with collaborative expertise. | Law Practice | 🇺🇸 New York | 4,946 | 1948 |
| 38 | [CohnReznick](https://www.tamtam.ai/c/cohnreznick) (cohnreznick.com)<br>Provides assurance, advisory, and tax services with deep industry knowledge to optimize performance, manage risk, and maximize value globally. | Accounting | 🇺🇸 New York | 4,923 | 1919 |
| 39 | [Havas Creative Network](https://www.tamtam.ai/c/havas-creative-network) (havascreative.com)<br>Innovative global communications network offering custom solutions through a connected ecosystem of multidisciplinary teams, with access to entertainment and culture | Advertising Services | 🇺🇸 New York | 4,874 |  |
| 40 | [Guy Carpenter](https://www.tamtam.ai/c/guy-carpenter) (guycarp.com)<br>specializes in global risk advisory and reinsurance brokerage, providing expert solutions to clients worldwide for managing complex risks. | Insurance | 🇺🇸 New York | 4,861 | 1922 |
| 41 | [NFP, an Aon company](https://www.tamtam.ai/c/nfp-an-aon-company) (nfp.com)<br>A global company offering specialized expertise in property & casualty brokering, benefits consulting, wealth management, and retirement plan advising Empowering clients with tailored solutions | Insurance | 🇺🇸 New York | 4,758 |  |
| 42 | [Presidio](https://www.tamtam.ai/c/presidio) (presidio.com)<br>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 | 🇺🇸 New York | 4,355 |  |
| 43 | [24 Seven Talent](https://www.tamtam.ai/c/24-seven-talent) (24seventalent.com)<br>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 | 🇺🇸 New York | 4,321 | 2000 |
| 44 | [STV](https://www.tamtam.ai/c/stv) (stvinc.com)<br>A professional services company specializing in transportation systems, building design, water systems, and other essential infrastructure for public and private sector clients | Civil Engineering | 🇺🇸 New York | 4,301 | 1912 |
| 45 | [Weber Shandwick](https://www.tamtam.ai/c/weber-shandwick) (webershandwick.com)<br>Global strategic communications agency specializing in earned media, creative brand strategies, and award-winning public relations services worldwide. | Public Relations and Communications Services | 🇺🇸 New York | 4,093 |  |
| 46 | [ReSource Pro](https://www.tamtam.ai/c/resource-pro) (resourcepro.com)<br>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 | 🇺🇸 New York | 4,073 | 2004 |
| 47 | [Burson](https://www.tamtam.ai/c/burson) (bursonglobal.com)<br>Global communications firm specializing in reputation management to create competitive advantage and long-term value for clients worldwide. | Public Relations and Communications Services | 🇺🇸 New York | 3,922 |  |
| 48 | [AlixPartners](https://www.tamtam.ai/c/alixpartners) (alixpartners.com)<br>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 | 🇺🇸 New York | 3,915 |  |
| 49 | [Simpson Thacher & Bartlett LLP](https://www.tamtam.ai/c/simpson-thacher-and-bartlett-llp) (stblaw.com)<br>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 | 🇺🇸 New York | 3,914 | 1884 |
| 50 | [Evercore](https://www.tamtam.ai/c/evercore) (evercore.com)<br>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 | 🇺🇸 New York | 3,888 | 1995 |
| 51 | [Ropes & Gray LLP](https://www.tamtam.ai/c/ropes-and-gray-llp) (ropesgray.com)<br>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 | 🇺🇸 New York | 3,647 |  |
| 52 | [The Legal Aid Society](https://www.tamtam.ai/c/the-legal-aid-society) (legalaidnyc.org)<br>Provide free legal services to low-income individuals, including criminal defense, civil legal services, and juvenile rights representation in Family Court | Law Practice | 🇺🇸 New York | 3,320 | 1876 |
| 53 | [Spark Foundry](https://www.tamtam.ai/c/spark-foundry) (sparkfoundryww.com)<br>A global media agency under Publicis Media, combining innovation with industry talent to deliver award-winning campaigns worldwide | Advertising Services | 🇺🇸 New York | 3,284 |  |
| 54 | [CTG](https://www.tamtam.ai/c/ctg-amherst) (ctg.com)<br>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 | 🇺🇸 Amherst | 3,092 |  |
| 55 | [HOK](https://www.tamtam.ai/c/hok) (hok.com)<br>A global firm offering design, architecture, engineering, and planning services to create sustainable and innovative solutions for clients and communities | Architecture and Planning | 🇺🇸 New York | 3,080 | 1955 |
| 56 | [Oppenheimer & Co. Inc.](https://www.tamtam.ai/c/oppenheimer-and-co-inc) (oppenheimer.com)<br>Provides wealth management, capital markets, and investment banking solutions, offering customized strategies to advance society and improve communities. | Financial Services | 🇺🇸 New York | 3,353 | 1881 |
| 57 | [Grey](https://www.tamtam.ai/c/grey) (grey.com)<br>Creative marketing agency delivering effective ideas and growth solutions for global brands through innovative advertising and business problem-solving strategies. | Advertising Services | 🇺🇸 New York | 2,957 | 1917 |
| 58 | [Weil, Gotshal & Manges LLP](https://www.tamtam.ai/c/weil-gotshal-and-manges-llp) (weil.com)<br>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 | 🇺🇸 New York | 2,952 |  |
| 59 | [Citrin Cooperman](https://www.tamtam.ai/c/citrin-cooperman) (citrincooperman.com)<br>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 | 🇺🇸 New York | 2,938 | 1979 |
| 60 | [Russell Reynolds Associates](https://www.tamtam.ai/c/russell-reynolds-associates) (russellreynolds.com)<br>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 | 🇺🇸 New York | 2,934 | 1969 |
| 61 | [Davis Polk & Wardwell LLP](https://www.tamtam.ai/c/davis-polk-and-wardwell-llp) (davispolk.com)<br>Global law firm providing sophisticated legal advice and practical solutions for complex business and legal challenges worldwide. | Law Practice | 🇺🇸 New York | 2,926 | 1849 |
| 62 | [Wilson Elser](https://www.tamtam.ai/c/wilson-elser) (wilsonelser.com)<br>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 | 🇺🇸 New York | 2,902 | 1978 |
| 63 | [Real Chemistry](https://www.tamtam.ai/c/real-chemistry) (realchemistry.com)<br>The company enhances healthcare commercial success through AI-powered experiences, putting the customer at the center and aiming to transform healthcare | Advertising Services | 🇺🇸 New York | 2,858 |  |
| 64 | [Paul, Weiss, Rifkind, Wharton & Garrison LLP](https://www.tamtam.ai/c/paul-weiss-rifkind-wharton-and-garrison-llp) (paulweiss.com)<br>A premier law firm with over 1,000 diverse lawyers providing innovative solutions for complex legal and business challenges to clients worldwide | Law Practice | 🇺🇸 New York | 2,838 | 1875 |
| 65 | [Cumming Group](https://www.tamtam.ai/c/cumming-group) (cumming-group.com)<br>Specializes in project, cost, and construction management services across multiple sectors, delivering tailored solutions globally through extensive expertise. | Construction | 🇺🇸 New York | 2,825 | 1996 |
| 66 | [FGS Global](https://www.tamtam.ai/c/fgs-global) (fgsglobal.com)<br>Global firm specializing in stakeholder strategy, enabling clients to lead, influence, and succeed during critical and decisive moments. | Business Consulting and Services | 🇺🇸 New York | 2,788 |  |
| 67 | [Cleary Gottlieb Steen & Hamilton LLP](https://www.tamtam.ai/c/cleary-gottlieb-steen-and-hamilton-llp) (clearygottlieb.com)<br>International law firm providing high-quality legal services with a focus on innovation, diversity, and client-centered solutions worldwide. | Law Practice | 🇺🇸 New York | 2,716 | 1946 |
| 68 | [Arcesium](https://www.tamtam.ai/c/arcesium) (arcesium.com)<br>A leading fintech company providing advanced data, operations, and analytics platform for financial institutions, optimizing investment lifecycle with industry-specific capabilities | Software Development | 🇺🇸 New York | 2,704 | 2015 |
| 69 | [Cantor Fitzgerald](https://www.tamtam.ai/c/cantor-fitzgerald) (cantor.com)<br>Global financial services firm specializing in equity and fixed income capital markets, investment banking, commercial real estate finance, and asset management technology. | Financial Services | 🇺🇸 New York | 2,655 |  |
| 70 | [WORKac](https://www.tamtam.ai/c/workac) (work.ac)<br>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 | 🇺🇸 New York | 2,654 | 2003 |
| 71 | [Interpublic Group (IPG)](https://www.tamtam.ai/c/interpublic-group-ipg) (omc.com)<br>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 | 🇺🇸 New York | 2,620 |  |
| 72 | [Jackson Lewis P.C.](https://www.tamtam.ai/c/jackson-lewis-p-c) (jacksonlewis.com)<br>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 | 🇺🇸 New York | 2,592 | 1958 |
| 73 | [J.S. Held LLC](https://www.tamtam.ai/c/j-s-held-llc) (jsheld.com)<br>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 | 🇺🇸 Jericho | 2,442 | 1974 |
| 74 | [Willkie Farr & Gallagher LLP](https://www.tamtam.ai/c/willkie-farr-and-gallagher-llp) (willkie.com)<br>Provides innovative and sophisticated legal services across multiple industries and markets with a global team of approximately 1,300 lawyers. | Law Practice | 🇺🇸 New York | 2,420 | 1888 |
| 75 | [Axiom](https://www.tamtam.ai/c/axiom-new-york) (axiomlaw.com)<br>Innovative legal services provider offering cost-effective solutions for global legal departments across various industries with high client satisfaction | Law Practice | 🇺🇸 New York | 2,398 | 2000 |
| 76 | [Marlabs](https://www.tamtam.ai/c/marlabs) (marlabs.com)<br>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 | 🇺🇸 New York | 2,345 | 1996 |
| 77 | [Hill & Knowlton](https://www.tamtam.ai/c/hill-and-knowlton) (hillandknowlton.com)<br>providing strategic communications services worldwide, managing reputations, engaging stakeholders, and delivering innovative campaigns across diverse industries and sectors | Public Relations and Communications Services | 🇺🇸 New York | 2,276 |  |
| 78 | [Proskauer Rose LLP](https://www.tamtam.ai/c/proskauer-rose-llp) (proskauer.com)<br>A global law firm with 800+ lawyers offering strategic legal representation to leading organizations, corporations, and industry-redefining companies worldwide | Law Practice | 🇺🇸 New York | 2,269 | 1875 |
| 79 | [Hazen and Sawyer](https://www.tamtam.ai/c/hazen-and-sawyer) (hazenandsawyer.com)<br>A company focused on providing safe drinking water and controlling water pollution through planning, design, and construction management of water-related projects | Environmental Services | 🇺🇸 New York | 2,261 | 1951 |
| 80 | [Skidmore, Owings & Merrill (SOM)](https://www.tamtam.ai/c/skidmore-owings-and-merrill-som) (som.com)<br>A leading design firm creating environmentally-advanced solutions for a better future, recognized for carbon neutrality and commitment to equality | Architecture and Planning | 🇺🇸 New York | 2,247 | 1936 |
| 81 | [UHY-US](https://www.tamtam.ai/c/uhy-us) (uhy-us.com)<br>UHY provides audit, tax, consulting and advisory services to middle market clients, offering innovative solutions tailored to their business challenges globally | Accounting | 🇺🇸 New York | 2,223 |  |
| 82 | [Ankura](https://www.tamtam.ai/c/ankura) (ankura.com)<br>Ankura Consulting Group provides expert services and solutions globally to help clients navigate critical challenges and opportunities in various areas | Business Consulting and Services | 🇺🇸 New York | 2,151 | 2014 |
| 83 | [Thornton Tomasetti](https://www.tamtam.ai/c/thornton-tomasetti) (thorntontomasetti.com)<br>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 | 🇺🇸 New York | 2,145 | 1949 |
| 84 | [CHA Consulting, Inc.](https://www.tamtam.ai/c/cha-consulting-inc) (chasolutions.com)<br>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 | 🇺🇸 Albany | 2,144 | 1952 |
| 85 | [Teneo](https://www.tamtam.ai/c/teneo) (teneo.com)<br>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 | 🇺🇸 New York | 2,094 |  |
| 86 | [Debevoise & Plimpton](https://www.tamtam.ai/c/debevoise-and-plimpton) (debevoise.com)<br>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 | 🇺🇸 New York | 2,089 |  |
| 87 | [Moelis & Company](https://www.tamtam.ai/c/moelis-and-company) (moelis.com)<br>Provides strategic financial advice and solutions to corporations, governments, and sponsors across mergers, restructurings, and capital markets worldwide. | Investment Banking | 🇺🇸 New York | 2,042 | 2007 |
| 88 | [Pride Global](https://www.tamtam.ai/c/pride-global) (prideglobal.com)<br>An integrated human capital solutions firm with diverse HR services globally and a focus on treating stakeholders exceptionally | Human Resources Services | 🇺🇸 New York | 2,019 | 1983 |
| 89 | [Pillsbury Winthrop Shaw Pittman LLP](https://www.tamtam.ai/c/pillsbury-winthrop-shaw-pittman-llp) (pillsburylaw.com)<br>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 | 🇺🇸 New York | 2,016 |  |
| 90 | [Ogilvy Public Relations](https://www.tamtam.ai/c/ogilvy-public-relations) (ogilvypr.com)<br>A global communications leader with over 85 offices worldwide, consistently recognized for creative excellence and innovative PR campaigns | Public Relations & Communications | 🇺🇸 New York | 1,999 | 1980 |
| 91 | [BIG - Bjarke Ingels Group](https://www.tamtam.ai/c/big-bjarke-ingels-group) (big.dk)<br>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 | 🇺🇸 Brooklyn | 1,994 | 2006 |
| 92 | [IBM iX](https://www.tamtam.ai/c/ibm-ix) (ibm.com)<br>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 | 🇺🇸 Armonk | 1,952 |  |
| 93 | [SG Analytics](https://www.tamtam.ai/c/sg-analytics) (sganalytics.com)<br>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 | 🇺🇸 New York | 1,939 | 2007 |
| 94 | [BBDO Worldwide](https://www.tamtam.ai/c/bbdo-worldwide) (bbdo.com)<br>Award-winning ad agency with global reach and passionate belief in creativity to drive brand growth through transformative consumer experiences | Advertising Services | 🇺🇸 New York | 1,913 | 1891 |
| 95 | [UnitedLex](https://www.tamtam.ai/c/unitedlex) (unitedlex.com)<br>A data and professional services company helping law firms and legal departments innovate through digital solutions, compliance, and legal operations | Legal Services | 🇺🇸 New York | 1,899 | 2006 |
| 96 | [maison](https://www.tamtam.ai/c/maison-new-york) (maisonthats.us)<br>This company specializes in transforming and building brands through strategy, creative design, brand identity, copywriting, and website development | Advertising Services | 🇺🇸 New York | 1,890 | 2019 |
| 97 | [CT Corporation](https://www.tamtam.ai/c/ct-corporation) (wolterskluwer.com)<br>A global leader providing solutions for legal compliance, financial management, and corporate services to professionals and small businesses worldwide | Legal Services | 🇺🇸 New York | 1,877 | 1892 |
| 98 | [Material](https://www.tamtam.ai/c/material) (materialplus.io)<br>The company provides insights, marketing, and technology services to create customer-centric business models and experiences for brands and companies | Business Consulting and Services | 🇺🇸 New York | 1,852 | 1973 |
| 99 | [DRIVER Media](https://www.tamtam.ai/c/driver-media) (driver.tv)<br>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 | 🇺🇸 New York | 1,802 |  |
| 100 | [ACA Group](https://www.tamtam.ai/c/aca-group) (acaglobal.com)<br>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 | 🇺🇸 New York | 1,766 | 2002 |

## 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.

## More company lists in New York State

- [The largest companies in New York State](https://www.tamtam.ai/l/largest-companies-new-york-state) (12,432)
- [Multinational companies in New York State](https://www.tamtam.ai/l/multinational-companies-new-york-state) (2,216)
- [Financial services firms in New York State](https://www.tamtam.ai/l/financial-services-firms-new-york-state) (1,272)
- [Financial Services companies in New York State](https://www.tamtam.ai/l/financial-services-companies-new-york-state) (1,076)
- [SaaS companies in New York State](https://www.tamtam.ai/l/saas-companies-new-york-state) (1,060)
- [Real Estate companies in New York State](https://www.tamtam.ai/l/real-estate-companies-new-york-state) (789)
- [Venture capital and private equity firms in New York State](https://www.tamtam.ai/l/vc-and-private-equity-firms-new-york-state) (757)
- [Software Development companies in New York State](https://www.tamtam.ai/l/software-development-companies-new-york-state) (696)
- [Education providers in New York State](https://www.tamtam.ai/l/education-companies-new-york-state) (656)
- [AI companies in New York State](https://www.tamtam.ai/l/ai-companies-new-york-state) (585)
- [IT Services and IT Consulting companies in New York State](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-new-york-state) (570)
- [Retail chains in New York State](https://www.tamtam.ai/l/retail-chains-new-york-state) (559)
- [Healthcare providers in New York State](https://www.tamtam.ai/l/healthcare-providers-new-york-state) (494)
- [Companies with a mobile app in New York State](https://www.tamtam.ai/l/companies-with-mobile-app-new-york-state) (491)
- [Subscription businesses in New York State](https://www.tamtam.ai/l/subscription-businesses-new-york-state) (485)
- [Consulting firms in New York State](https://www.tamtam.ai/l/consulting-firms-new-york-state) (474)
- [Advertising Services companies in New York State](https://www.tamtam.ai/l/advertising-services-companies-new-york-state) (473)
- [IT services companies in New York State](https://www.tamtam.ai/l/it-services-companies-new-york-state) (468)
- [Investment Management companies in New York State](https://www.tamtam.ai/l/investment-management-companies-new-york-state) (457)
- [Marketing and communications agencies in New York State](https://www.tamtam.ai/l/marketing-agencies-new-york-state) (449)
- [Companies with in-house R&D in New York State](https://www.tamtam.ai/l/r-and-d-companies-new-york-state) (419)
- [Hospitals and Health Care companies in New York State](https://www.tamtam.ai/l/hospitals-and-health-care-companies-new-york-state) (408)
- [Venture Capital and Private Equity Principals companies in New York State](https://www.tamtam.ai/l/venture-capital-and-private-equity-principals-companies-new-york-state) (398)
- [Manufacturers in New York State](https://www.tamtam.ai/l/manufacturers-new-york-state) (398)

## The same list elsewhere in United States

- [Professional services firms in the United States](https://www.tamtam.ai/l/professional-services-firms-united-states) (7,078)
- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Professional services firms in Texas](https://www.tamtam.ai/l/professional-services-firms-texas) (629)
- [Professional services firms in Florida](https://www.tamtam.ai/l/professional-services-firms-florida) (375)
- [Professional services firms in Virginia](https://www.tamtam.ai/l/professional-services-firms-virginia) (344)
- [Professional services firms in Illinois](https://www.tamtam.ai/l/professional-services-firms-illinois) (339)
- [Professional services firms in Massachusetts](https://www.tamtam.ai/l/professional-services-firms-massachusetts) (249)
- [Professional services firms in New Jersey](https://www.tamtam.ai/l/professional-services-firms-new-jersey) (249)
- [Professional services firms in Georgia](https://www.tamtam.ai/l/professional-services-firms-georgia) (246)
- [Professional services firms in Pennsylvania](https://www.tamtam.ai/l/professional-services-firms-pennsylvania) (245)
- [Professional services firms in Ohio](https://www.tamtam.ai/l/professional-services-firms-ohio) (195)
- [Professional services firms in Maryland](https://www.tamtam.ai/l/professional-services-firms-maryland) (176)
- [Professional services firms in Michigan](https://www.tamtam.ai/l/professional-services-firms-michigan) (172)
- [Professional services firms in Washington State](https://www.tamtam.ai/l/professional-services-firms-washington-state) (163)
- [Professional services firms in North Carolina](https://www.tamtam.ai/l/professional-services-firms-north-carolina) (142)
- [Professional services firms in Alabama](https://www.tamtam.ai/l/professional-services-firms-alabama) (135)
- [Professional services firms in Minnesota](https://www.tamtam.ai/l/professional-services-firms-minnesota) (125)
- [Professional services firms in New York](https://www.tamtam.ai/l/professional-services-firms-new-york) (735)
- [Professional services firms in Chicago](https://www.tamtam.ai/l/professional-services-firms-chicago) (196)
- [Professional services firms in Houston](https://www.tamtam.ai/l/professional-services-firms-houston) (156)
- [Professional services firms in Atlanta](https://www.tamtam.ai/l/professional-services-firms-atlanta) (143)
- [Professional services firms in San Francisco](https://www.tamtam.ai/l/professional-services-firms-san-francisco) (130)
- [Professional services firms in Washington](https://www.tamtam.ai/l/professional-services-firms-washington) (109)
- [Professional services firms in Los Angeles](https://www.tamtam.ai/l/professional-services-firms-los-angeles) (108)

---

Source: https://www.tamtam.ai/l/professional-services-firms-new-york-state