Top 50 professional services firms in Arizona (2026 list)

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.

#	Company	Industry	Headquarters	Employees	Founded
1	Insight insight.com 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 global.lockton.com Private ownership enabling independent focus on clients' risk and insurance needs with global expertise and remarkable results.	Insurance	🇺🇸 Global	14,780	1966
3	Persona personatalent.com 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 reedsmith.com 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 teamexos.com 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 uscourts.gov 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	n/a
7	Faegre Drinker faegredrinker.com 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.centuri.com Strategic infrastructure services company partnering with utilities to build, maintain energy networks delivering electricity and natural gas safely and sustainably.	Construction	🇺🇸 Phoenix	1,912	n/a
9	CyraCom Language Solutions cyracom.com 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 helmsbriscoe.com 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 vertexeducation.com 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 Professional accounting services based in Phoenix, Arizona, offering financial expertise and support to businesses and individuals in the United States	Accounting	🇺🇸 Phoenix	1,465	n/a
13	Snell & Wilmer swlaw.com 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 afprofessionals.com 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.m3eng.com 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 fennemorelaw.com 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 retail-options.com 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 thedavisexperience.com 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)hsag.com 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 domains.atom.com 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 abstaffing.com 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 erc-incorporated.com 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	n/a
23	MSR-FSR, LLC msr-fsr.com 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.us.nttdata.com 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 tristar.com 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
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. Get more companies, free
26	Chronicle Heritage chronicleheritage.com 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 escribers.net 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 adflegal.org 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 telgian.com 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 spherion.com Service-focused staffing firm prioritizing team excellence and client success Seeking passionate professionals for positive, collaborative environment	Staffing and Recruiting	🇺🇸	372	n/a
31	Lewis Roca lewisroca.com 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.cei-az.com 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 m3bi.zensar.com 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 concentrichealthcare.com 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 rlattorneys.com 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 crnrstone.com 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 laneterralever.com 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 mahoneygroup.com 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 psware.com 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 nucleusteq.com 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 thebestclaims.com 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.mmsgi.com Provider of web-based medical billing services to streamline and manage medical billing tasks efficiently for healthcare providers and facilities	Medical Practices	🇺🇸 Yuma	289	n/a
43	Patrice and Associates Franchising LLC patriceandassociates.com 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 mgasearch.com 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 corporatevisions.com 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)dentistrysupport.com 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 thinkartha.com 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 thecallcentergroupa-z.com 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 vertech.com 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 vhltec.com 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

Turn this list into pipeline

Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.

Build your own list, free

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.

Top 50 professional services firms in Arizona

Want more companies than this list?

Turn this list into pipeline

How this list is built

More company lists in Arizona

The same list elsewhere in United States