# Professional services firms headquartered in Phoenix

Tamtam tracks 37 professional services firms headquartered in Phoenix. This list ranks the 30 largest by number of employees on LinkedIn, led by Exos, Centuri Group, Inc. and SWCA Environmental Consultants. Their median headcount is 355. Half of them were founded in 1999 or later.

These professional services firms in Phoenix are primarily mid-sized to large companies, with a strong presence in legal, environmental, and accounting sectors. Notable firms include Snell & Wilmer, a full-service business law firm founded in 1938, and SWCA Environmental Consultants, which provides comprehensive environmental planning and consulting. Exos offers holistic health coaching for various populations, while Centuri Group, Inc. specializes in infrastructure services for utilities. Accounting Offices provides financial expertise to businesses and individuals.

A recurring pattern among these companies is their focus on specialized consulting and support services. This includes firms like Chronicle Heritage, which manages heritage resources, and Telgian, offering fire, security, and life safety consulting. Many of these firms, such as Fennemore (founded 1885) and Lewis Roca (founded 1950), have long histories, indicating established expertise in their respective fields.

🇺🇸 Phoenix · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [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 |
| 2 | [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 |  |
| 3 | [SWCA Environmental Consultants](https://www.tamtam.ai/c/swca-environmental-consultants) (swca.com)<br>Experts deliver comprehensive solutions in environmental planning, permitting, cultural resource management, biological services, water resources management, air quality, and sustainability consulting. | Environmental Services | 🇺🇸 Phoenix | 1,746 | 1981 |
| 4 | [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 |  |
| 5 | [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 |
| 6 | [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 |
| 7 | [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 |
| 8 | [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 |
| 9 | [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 |
| 10 | [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 |
| 11 | [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 |
| 12 | [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 |
| 13 | [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 |
| 14 | [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 |
| 15 | [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 |
| 16 | [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 |
| 17 | [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 |
| 18 | [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 |
| 19 | [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 |
| 20 | [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 |
| 21 | [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 |
| 22 | [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 |
| 23 | [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 |
| 24 | [MO](https://www.tamtam.ai/c/mo-phoenix) (themostudio.com)<br>Designs intuitive and sustainable experiences for government leaders, using design thinking and human-centered design to solve complex challenges Values: Curiosity, Courage, Integrity | Technology, Information and Internet | 🇺🇸 Phoenix | 202 | 2016 |
| 25 | [SEG International](https://www.tamtam.ai/c/seg-international) (azseg.com)<br>A leader in sustainable civil engineering site design, focusing on environmentally conscious approaches to land development projects nationwide | Civil Engineering | 🇺🇸 Phoenix | 116 | 2009 |
| 26 | [TFO Family Office Partners](https://www.tamtam.ai/c/tfo-family-office-partners) (linktr.ee)<br>TFO Phoenix guides families in aligning their wealth with their goals through holistic advice in wealth planning, investment, tax, estate, and philanthropic planning | Financial Services | 🇺🇸 Phoenix | 78 | 2011 |
| 27 | [IMPACT Technology Recruiting](https://www.tamtam.ai/c/impact-technology-recruiting) (goimpacttechnology.com)<br>An IT recruiting service dedicated to providing exceptional service by leveraging technology, experience, and building strong professional relationships for clients and candidates | Staffing and Recruiting | 🇺🇸 Phoenix | 74 | 2012 |
| 28 | [CAM](https://www.tamtam.ai/c/cam) (camproperties.com)<br>A leading Arizona multifamily real estate company offering a fully integrated platform including property management, construction, marketing, and acquisition support | Real Estate | 🇺🇸 Phoenix | 55 | 1993 |
| 29 | [Position Sports](https://www.tamtam.ai/c/position-sports) (positionsports.com)<br>A premium brand marketing firm specializing in sports integration strategy, event operations, media relations, and digital engagement for leading global brands | Spectator Sports | 🇺🇸 Phoenix | 53 | 2005 |
| 30 | [MGKS](https://www.tamtam.ai/c/mgks) (mgks.com)<br>Providing tailored retirement plan solutions for businesses nationwide, with a focus on quality service and personalized expertise from a credentialed staff | Financial Services | 🇺🇸 Phoenix | 36 | 1980 |

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