# Top 50 professional services firms in Arizona

Tamtam tracks 97 professional services firms headquartered in Arizona. This list ranks the 50 largest by number of employees on LinkedIn, led by Insight, Lockton and Persona. Their median headcount is 415. Half of them were founded in 1998 or later. The most common headquarters are Phoenix (22), Scottsdale (9) and Chandler (6).

The professional services firms in Arizona are a diverse group, with a strong presence in legal, staffing, and technology-related services. Insight, a Fortune 500 solutions integrator, specializes in digital transformation. Lockton provides risk and insurance solutions, while Persona offers top assistants to help businesses scale. Reed Smith LLP and Faegre Drinker are global law firms, and Exos focuses on holistic health coaching.

A notable pattern among these companies is the concentration of headquarters in the Phoenix metropolitan area, including Phoenix, Chandler, and Scottsdale. While some firms like Lockton and Reed Smith have global headquarters, a significant number of the largest professional services firms in Arizona are rooted locally, indicating a strong regional professional services hub.

🇺🇸 Arizona · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Insight](https://www.tamtam.ai/c/insight) (insight.com)<br>A Fortune 500 solutions integrator specializing in accelerating digital transformation, modernizing businesses, and maximizing technology value through deep partnerships | IT Services and IT Consulting | 🇺🇸 Chandler | 19,219 | 1988 |
| 2 | [Lockton](https://www.tamtam.ai/c/lockton) (global.lockton.com)<br>Private ownership enabling independent focus on clients' risk and insurance needs with global expertise and remarkable results. | Insurance | 🇺🇸 Global | 14,780 | 1966 |
| 3 | [Persona](https://www.tamtam.ai/c/persona-37564254) (personatalent.com)<br>Persona embeds top assistants to help businesses scale faster by providing unparalleled talent, saving clients an average of 32 hours per week | Staffing and Recruiting | 🇺🇸 Worldwide | 3,927 | 2019 |
| 4 | [Reed Smith LLP](https://www.tamtam.ai/c/reed-smith-llp) (reedsmith.com)<br>Global law firm offering experienced legal counsel to drive progress for clients, communities, and ourselves through collaboration, industry insight, and innovation | Law Practice | 🇺🇸 Worldwide | 3,849 | 1877 |
| 5 | [Exos](https://www.tamtam.ai/c/exos) (teamexos.com)<br>A holistic health coaching company specializing in evidence-based programs for elite athletes, corporate employees, first responders, and military personnel worldwide | Wellness and Fitness Services | 🇺🇸 Phoenix | 2,324 | 1999 |
| 6 | [Federal Defender Organizations](https://www.tamtam.ai/c/federal-defender-organizations) (uscourts.gov)<br>Provides legal representation for financially eligible defendants in federal criminal proceedings through a comprehensive system established by the Criminal Justice Act | Law Practice | 🇺🇸 | 2,252 |  |
| 7 | [Faegre Drinker](https://www.tamtam.ai/c/faegre-drinker) (faegredrinker.com)<br>A comprehensive firm with over 1,200 attorneys offering legal, consulting, public policy, data science, and healthcare advisory services globally | Law Practice | 🇺🇸 Global | 1,962 | 2020 |
| 8 | [Centuri Group, Inc.](https://www.tamtam.ai/c/centuri-group-inc) (centuri.com)<br>Strategic infrastructure services company partnering with utilities to build, maintain energy networks delivering electricity and natural gas safely and sustainably. | Construction | 🇺🇸 Phoenix | 1,912 |  |
| 9 | [CyraCom Language Solutions](https://www.tamtam.ai/c/cyracom-language-solutions) (cyracom.com)<br>Industry-leading language services provider offering interpretation and translation in 300+ languages, with a focus on quality, speed, accessibility, and client support | Translation and Localization | 🇺🇸 Tucson | 1,870 | 1995 |
| 10 | [HelmsBriscoe](https://www.tamtam.ai/c/helmsbriscoe) (helmsbriscoe.com)<br>Global leader in meetings procurement, guiding organizations in finding the best venues for events worldwide with expertise and industry relationships since 1992 | Hospitality | 🇺🇸 Scottsdale | 1,691 | 1992 |
| 11 | [Vertex Education](https://www.tamtam.ai/c/vertex-education) (vertexeducation.com)<br>Vertex Education is a purpose-led education services provider that positively impacts over 100,000 students across multiple states through supporting schools in various areas | Education Administration Programs | 🇺🇸 Chandler | 1,598 | 2007 |
| 12 | [Accounting Offices](https://www.tamtam.ai/c/accounting-offices)<br>Professional accounting services based in Phoenix, Arizona, offering financial expertise and support to businesses and individuals in the United States | Accounting | 🇺🇸 Phoenix | 1,465 |  |
| 13 | [Snell & Wilmer](https://www.tamtam.ai/c/snell-and-wilmer) (swlaw.com)<br>Established in 1938, this full-service business law firm with over 450 lawyers offers transactional and litigation legal services in various practice areas to a diverse client base | Law Practice | 🇺🇸 Phoenix | 1,305 | 1938 |
| 14 | [Accounting & Finance Professionals](https://www.tamtam.ai/c/accounting-and-finance-professionals) (afprofessionals.com)<br>A full-service staffing and recruiting firm specializing in accounting/financial, administrative, and executive positions, committed to providing excellent service to job seekers and employers | Staffing and Recruiting | 🇺🇸 Phoenix | 1,102 | 1999 |
| 15 | [M3 Engineering & Technology Corp.](https://www.tamtam.ai/c/m3-engineering-and-technology-corp) (m3eng.com)<br>M3 is a full-service design firm offering architecture, engineering, and construction management services internationally, specializing in mining and astronomical projects | Design Services | 🇺🇸 Tucson | 739 | 1986 |
| 16 | [Fennemore](https://www.tamtam.ai/c/fennemore) (fennemorelaw.com)<br>A legal firm providing innovative counsel to help clients navigate the complex business landscape, protect legal interests, identify opportunities, and thrive | Law Practice | 🇺🇸 Phoenix | 736 | 1885 |
| 17 | [Retail Options](https://www.tamtam.ai/c/retail-options) (retail-options.com)<br>A search firm specializing in recruiting for businesses of all sizes in the US and Canada, with a focus on tough-to-fill positions and special projects | Retail | 🇺🇸 Phoenix | 643 | 2011 |
| 18 | [DAVIS](https://www.tamtam.ai/c/davis) (thedavisexperience.com)<br>Specializing in Architecture, Interiors, and Urban Design, creating exceptional commercial and residential mixed-use properties to enhance quality of life in places people live, work, and gather | Architecture and Planning | 🇺🇸 Phoenix | 567 | 1991 |
| 19 | [Health Services Advisory Group, Inc. (HSAG)](https://www.tamtam.ai/c/health-services-advisory-group-inc-hsag) (hsag.com)<br>Improves Medicare and Medicaid healthcare quality through reviews, surveys, and interventions, focusing on efficiency, access, and beneficiary outcomes. | Hospitals and Health Care | 🇺🇸 Phoenix | 503 | 1979 |
| 20 | [Clairvoyant](https://www.tamtam.ai/c/clairvoyant) (domains.atom.com)<br>Global technology consulting firm specializing in maximizing the value of data through services such as data engineering, analytics, machine learning, and user experience consulting and development | IT Services and IT Consulting | 🇺🇸 Chandler | 495 | 2012 |
| 21 | [AB Staffing Solutions](https://www.tamtam.ai/c/ab-staffing-solutions) (abstaffing.com)<br>Healthcare staffing agency providing Nurses, Allied Health Professionals, Locums Tenens, and Advanced Practice Providers to federal and commercial hospitals nationwide for exceptional patient care | Staffing and Recruiting | 🇺🇸 Gilbert | 494 | 2002 |
| 22 | [ERC, Inc](https://www.tamtam.ai/c/erc-inc) (erc-incorporated.com)<br>Engineering and scientific services firm offering independent assessment, IT support, and operations & maintenance support to clients in defense, NASA, and commercial sectors | Defense and Space Manufacturing | 🇺🇸 | 466 |  |
| 23 | [MSR-FSR, LLC](https://www.tamtam.ai/c/msr-fsr-llc) (msr-fsr.com)<br>A provider of on-site services with certified FSEs and off-site programs for repairing critical manufacturing parts in semiconductor, solar, and pharmaceutical industries | Semiconductor Manufacturing | 🇺🇸 Chandler | 439 | 1996 |
| 24 | [Apisero Inc.](https://www.tamtam.ai/c/apisero-inc) (us.nttdata.com)<br>A leading IT and business services provider specializing in cloud, data, and applications, committed to delivering innovative solutions and exceptional service | IT Services and IT Consulting | 🇺🇸 Chandler | 418 | 2016 |
| 25 | [TriStar Digital Thread Solutions](https://www.tamtam.ai/c/tristar-digital-thread-solutions) (tristar.com)<br>The company specializes in Product Lifecycle Management, offering tailored solutions to optimize product development processes and achieve more profitable results | Business Consulting and Services | 🇺🇸 Phoenix | 415 | 1988 |
| 26 | [Chronicle Heritage](https://www.tamtam.ai/c/chronicle-heritage) (chronicleheritage.com)<br>heritage resource management firm guiding public and private projects through regulatory challenges involving archaeological, architectural, and paleontological resources with innovative solutions | Environmental Services | 🇺🇸 Phoenix | 409 | 2006 |
| 27 | [eScribers, LLC](https://www.tamtam.ai/c/escribers-llc) (escribers.net)<br>A transcription service specializing in accurate and efficient solutions for clients, focusing on quality, technology, and personalized service since 2005 | Legal Services | 🇺🇸 Phoenix | 392 | 2005 |
| 28 | [Alliance Defending Freedom](https://www.tamtam.ai/c/alliance-defending-freedom) (adflegal.org)<br>An alliance-building legal organization advocating for religious liberty, sanctity of life, and marriage and family rights since 1994 | Law Practice | 🇺🇸 Scottsdale | 390 | 1994 |
| 29 | [Telgian](https://www.tamtam.ai/c/telgian) (telgian.com)<br>A trusted partner since 1985, providing innovative fire, security, and life safety consulting/engineering services globally to keep facilities safe, compliant, and on budget | Fire Protection | 🇺🇸 Phoenix | 374 | 1985 |
| 30 | [Spherion Professional Services](https://www.tamtam.ai/c/spherion-professional-services) (spherion.com)<br>Service-focused staffing firm prioritizing team excellence and client success Seeking passionate professionals for positive, collaborative environment | Staffing and Recruiting | 🇺🇸 | 372 |  |
| 31 | [Lewis Roca](https://www.tamtam.ai/c/lewis-roca) (lewisroca.com)<br>Legal and strategic industry experience firm in the western US, offering services in litigation, IP, business transactions, and regulatory compliance, with a focus on client satisfaction | Law Practice | 🇺🇸 Phoenix | 355 | 1950 |
| 32 | [Consultant Engineering, Inc.](https://www.tamtam.ai/c/consultant-engineering-inc) (cei-az.com)<br>Professional consulting firm specializing in construction management services with a dedicated team of engineers, inspectors, technicians, administrators, and support staff | Civil Engineering | 🇺🇸 Phoenix | 345 | 1996 |
| 33 | [M3BI - A Zensar Company](https://www.tamtam.ai/c/m3bi-a-zensar-company) (m3bi.zensar.com)<br>Next generation IT services company specializing in digital, data, and analytics, providing niche solutions including BI, ETL, visualization, and big data initiatives to multinational clients | IT Services and IT Consulting | 🇺🇸 Scottsdale | 342 | 2010 |
| 34 | [Concentric Healthcare Staffing](https://www.tamtam.ai/c/concentric-healthcare-staffing) (concentrichealthcare.com)<br>Specializing in healthcare staffing services, we provide skilled, dedicated professionals for facilities through rigorous screening processes and various staffing solutions | Hospitals and Health Care | 🇺🇸 Scottsdale | 342 | 2003 |
| 35 | [Resnick & Louis, P.C. - Attorneys at Law](https://www.tamtam.ai/c/resnick-and-louis-p-c-attorneys-at-law) (rlattorneys.com)<br>A diverse team of experienced attorneys providing nationwide legal representation, specializing in negotiation, mediation, trial, and resolution of litigated matters while prioritizing client satisfaction and communication | Law Practice | 🇺🇸 Scottsdale | 340 | 2012 |
| 36 | [Cornerstone Advisors](https://www.tamtam.ai/c/cornerstone-advisors) (crnrstone.com)<br>Specializing in improving strategies, technologies, and operations for financial institutions, helping them achieve better financial performance through expert advice and industry knowledge | Financial Services | 🇺🇸 Scottsdale | 339 | 2002 |
| 37 | [LT](https://www.tamtam.ai/c/lt) (laneterralever.com)<br>Innovative marketing agency specializing in various industries, providing impactful solutions and unforgettable customer experiences with expertise in strategy, analytics, content, and design | Advertising Services | 🇺🇸 Phoenix | 338 | 1962 |
| 38 | [The Mahoney Group](https://www.tamtam.ai/c/the-mahoney-group) (mahoneygroup.com)<br>The company offers comprehensive risk management, claims advocacy, and innovative employee benefit solutions to empower clients and provide peace of mind | Insurance Agencies and Brokerages | 🇺🇸 Chandler | 335 | 1915 |
| 39 | [Performance Software Corporation](https://www.tamtam.ai/c/performance-software-corporation) (psware.com)<br>A software and systems engineering firm specializing in embedded avionics, medical device software, energy, and automotive solutions with a strong reputation in the industry | Engineering Services | 🇺🇸 Phoenix | 320 | 1998 |
| 40 | [NucleusTeq](https://www.tamtam.ai/c/nucleusteq) (nucleusteq.com)<br>Specializing in digital and data transformation, our company empowers businesses with big-data, cloud, analytics, blockchain, automation, and mobility solutions | IT Services and IT Consulting | 🇺🇸 Phoenix | 318 | 2018 |
| 41 | [TheBest Claims Solutions](https://www.tamtam.ai/c/thebest-claims-solutions) (thebestclaims.com)<br>A claims industry leader offering quality solutions through partnerships, providing claims services and recruiting top talent nationwide in various sectors | Insurance | 🇺🇸 Phoenix | 302 | 1997 |
| 42 | [Medical Coding & Billing Services, Inc.](https://www.tamtam.ai/c/medical-coding-and-billing-services-inc) (mmsgi.com)<br>Provider of web-based medical billing services to streamline and manage medical billing tasks efficiently for healthcare providers and facilities | Medical Practices | 🇺🇸 Yuma | 289 |  |
| 43 | [Patrice and Associates Franchising LLC](https://www.tamtam.ai/c/patrice-and-associates-franchising-llc) (patriceandassociates.com)<br>A recruiting agency specializing in filling management positions within the hospitality industry, connecting qualified candidates with opportunities at various establishments nationwide | Staffing and Recruiting | 🇺🇸 Scottsdale | 284 | 1989 |
| 44 | [MGA Employee Services](https://www.tamtam.ai/c/mga-employee-services) (mgasearch.com)<br>Nationwide staffing services for various industries, offering personalized service with 24/7 availability, focused on treating people well to build lasting relationships with employees and clients | Staffing and Recruiting | 🇺🇸 Scottsdale | 284 | 1992 |
| 45 | [Corporate Visions](https://www.tamtam.ai/c/corporate-visions) (corporatevisions.com)<br>Provider of science-backed revenue growth services for B2B companies, helping them articulate value in customer conversations through situational, specific, and systematic approaches | Business Consulting and Services | 🇺🇸 Mesa | 278 | 1984 |
| 46 | [Dentistry Support (R)](https://www.tamtam.ai/c/dentistry-support-r) (dentistrysupport.com)<br>Dentistry Support offers comprehensive support services to dental offices nationwide, focusing on patient care, practice management, coaching, and consulting for optimal success | Medical Practices | 🇺🇸 Queen Creek | 263 | 2014 |
| 47 | [Artha Solutions](https://www.tamtam.ai/c/artha-solutions) (thinkartha.com)<br>A leading business technology consulting firm helping businesses maximize the value of their data through strategic solutions across various industries globally | IT Services and IT Consulting | 🇺🇸 Scottsdale | 241 | 2012 |
| 48 | [The Call Center Group A-Z](https://www.tamtam.ai/c/the-call-center-group-a-z) (thecallcentergroupa-z.com)<br>A leading Call Center management and executive search firm in the US, specializing in recruiting Contact Center professionals and executives nationwide | Staffing and Recruiting | 🇺🇸 Phoenix | 225 | 2006 |
| 49 | [Vertech](https://www.tamtam.ai/c/vertech-phoenix) (vertech.com)<br>Industrial control systems integration firm providing engineering and technical services, designing and building world-class control systems using top industry hardware and software | Automation Machinery Manufacturing | 🇺🇸 Phoenix | 222 | 2004 |
| 50 | [VHL Technologies Inc](https://www.tamtam.ai/c/vhl-technologies-inc) (vhltec.com)<br>An IT services firm in the USA specializing in IT consulting, product development, infrastructure management, and staffing, with a focus on value delivery and trust | IT Services and IT Consulting | 🇺🇸 Phoenix | 209 | 2012 |

## 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 12, 2026.

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Source: https://www.tamtam.ai/l/professional-services-firms-arizona