# Professional services firms headquartered in Alabama

Tamtam tracks 135 professional services firms headquartered in Alabama. This list ranks the 50 largest by number of employees on LinkedIn, led by C.S, Mercer España and Sedgwick. Their median headcount is 1,816. Half of them were founded in 1994 or later. The most common headquarters are New York (6), Huntsville (4) and Mobile (3).

The professional services firms in Alabama listed here are mostly large companies operating across various sectors. Companies like C.S. provide IT services, Mercer España offers professional training and coaching, and Sedgwick specializes in insurance. Other notable firms include Kelly in staffing and recruiting, Propio Language Services for translation, and CLA (CliftonLarsonAllen) in accounting.

These firms represent a diverse mix of professional services. A common pattern observed is the presence of several civil engineering companies such as HNTB, Terracon, and JMT, indicating a strong focus on infrastructure and development within the professional services landscape in Alabama.

🇺🇸 Alabama · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [C.S](https://www.tamtam.ai/c/csc-1120)<br>The company does amazing things. These amazing things happen daily. They are involved in many amazing projects and activities. | IT Services and IT Consulting | 🇺🇸 Global | 44,000 | 1959 |
| 2 | [Mercer España](https://www.tamtam.ai/c/mercer-espana) (mercer.com)<br>Mercer is a global consultancy business focused on providing trusted advice and solutions to help organizations build brighter, healthier, and more sustainable futures | Professional Training and Coaching | 🇺🇸 New York | 25,000 | 1945 |
| 3 | [Sedgwick](https://www.tamtam.ai/c/sedgwick) (sedgwick.com)<br>A global provider of risk, benefits, and business solutions, offering tailored resources to help organizations with health, claims, brand protection, and business continuity | Insurance | 🇺🇸 | 23,170 | 1969 |
| 4 | [Kelly](https://www.tamtam.ai/c/kelly) (kellyservices.com)<br>A pioneering staffing company connecting over 450,000 individuals with work annually, leveraging expertise in various industries since 1946 | Staffing and Recruiting | 🇺🇸 Troy | 20,231 | 1946 |
| 5 | [Propio Language Services](https://www.tamtam.ai/c/propio-language-services) (propio.com)<br>Providing technology-driven interpreting, translation, and localization services. Ensuring Limited English Proficient speakers access essential services through certified, ethical interpreters. | Translation and Localization | 🇺🇸 Overland Park | 11,345 | 1998 |
| 6 | [CLA (CliftonLarsonAllen)](https://www.tamtam.ai/c/cla-cliftonlarsonallen) (claconnect.com)<br>A company providing industry-focused wealth advisory, outsourcing, audit, tax, and consulting services with a global presence, emphasizing personalized client relationships | Accounting | 🇺🇸 | 9,503 | 2012 |
| 7 | [HNTB](https://www.tamtam.ai/c/hntb) (hntb.com)<br>An employee-owned infrastructure solutions firm specializing in innovative transportation systems and infrastructure solutions to connect people and expand opportunities | Civil Engineering | 🇺🇸 | 7,839 | 1914 |
| 8 | [Innova Solutions](https://www.tamtam.ai/c/innova-solutions) (innovasolutions.com)<br>Innova Solutions provides transformative digital solutions, specializing in AI, data analytics, cloud computing, and cybersecurity for various industries globally. | IT Services and IT Consulting | 🇺🇸 Atlanta | 7,703 |  |
| 9 | [Tiger Analytics](https://www.tamtam.ai/c/tiger-analytics) (tigeranalytics.com)<br>A global leader in AI and Analytics, offering fullstack services to Fortune 1000 companies across various industries to achieve real outcomes at scale | Business Consulting and Services | 🇺🇸 Santa Clara | 7,353 | 2011 |
| 10 | [Terracon](https://www.tamtam.ai/c/terracon) (terracon.com)<br>This employee-owned consulting engineering firm offers environmental, facilities, geotechnical, and materials services for diverse private and public clients across numerous locations, both nationally and internationally. | Civil Engineering | 🇺🇸 Olathe | 7,073 | 1965 |
| 11 | [Securitas Technology](https://www.tamtam.ai/c/securitas-technology) (securitastechnology.com)<br>Provides integrated security solutions globally. Focuses on protecting, connecting, and optimizing businesses. Aims to make the world a safer place through its services. | Security and Investigations | 🇺🇸 Uniontown | 4,591 |  |
| 12 | [EisnerAmper](https://www.tamtam.ai/c/eisneramper) (eisneramper.com)<br>Provides attest services through an independent CPA firm and business advisory, non-attest services via an alternative practice structure for various business sectors. | Accounting | 🇺🇸 New York | 4,157 | 1963 |
| 13 | [Pilot Catastrophe Services](https://www.tamtam.ai/c/pilot-catastrophe-services) (pilotcat.com)<br>The company is dedicated to providing quality service in the claims process, driving innovation in the industry, and giving back to communities | Insurance | 🇺🇸 Mobile | 3,992 | 1983 |
| 14 | [JMT](https://www.tamtam.ai/c/jmt) (jmt.com)<br>This employee-owned, multi-disciplined firm offers planning, design, and construction consulting services for infrastructure projects across the United States for various clients. | Civil Engineering | 🇺🇸 Serving Clients Across the US | 2,710 |  |
| 15 | [Kantar Millward Brown](https://www.tamtam.ai/c/kantar-millward-brown) (kantar.com)<br>Global consulting company providing evidence-based insights on consumer behavior through data, analytics, and technology to inspire growth for clients worldwide | Market Research | 🇺🇸 London | 2,530 | 1973 |
| 16 | [WilmerHale](https://www.tamtam.ai/c/wilmerhale) (wilmerhale.com)<br>A leading international law firm with over 1,000 lawyers in 13 offices worldwide, specializing in government, technology, and business law Promotes diversity and public service | Law Practice | 🇺🇸 Washington | 2,356 |  |
| 17 | [Polsinelli](https://www.tamtam.ai/c/polsinelli) (polsinelli.com)<br>A top Am Law 100 firm with over 1,000 attorneys nationwide offering legal counsel in various sectors like health care, finance, and technology | Law Practice | 🇺🇸 | 2,292 |  |
| 18 | [FleishmanHillard](https://www.tamtam.ai/c/fleishmanhillard) (fleishmanhillard.com)<br>Global communications agency specializing in inclusive culture, diversity initiatives, award-winning public relations, and community service across multiple countries. | Public Relations and Communications Services | 🇺🇸 St. Louis | 2,252 | 1946 |
| 19 | [Carr, Riggs & Ingram](https://www.tamtam.ai/c/carr-riggs-and-ingram) (criadv.com)<br>A nationally-ranked accounting and advisory firm providing traditional accounting services, business support, technology resources, assurance offerings, and helping clients achieve competitive advantage | Business Consulting and Services | 🇺🇸 Enterprise | 2,131 | 1997 |
| 20 | [Onin Staffing](https://www.tamtam.ai/c/onin-staffing) (oninstaffing.com)<br>A national staffing agency specializing in light industrial and clerical roles, providing personalized guidance, unbeatable benefits, and innovative solutions for workforce challenges | Staffing and Recruiting | 🇺🇸 Birmingham | 2,001 | 1994 |
| 21 | [Automated Systems Design, Inc.](https://www.tamtam.ai/c/automated-systems-design-inc) (asd-usa.com)<br>Provides nationwide design, engineering, and project management for Division 27 and 28 construction, including access control, surveillance, A/V, cabling, GPON, sound, and notification systems. | IT Services and IT Consulting | 🇺🇸 Alpharetta | 1,977 | 1987 |
| 22 | [InfoVision Inc.](https://www.tamtam.ai/c/infovision-inc) (infovision.com)<br>Leading global IT services company offering enterprise digital transformation and modernization solutions across various business verticals, helping clients with innovation and workflow transformation. | IT Services and IT Consulting | 🇺🇸 Richardson | 1,970 | 1995 |
| 23 | [Hargrove Engineers & Constructors](https://www.tamtam.ai/c/hargrove-engineers-and-constructors) (hargrove-epc.com)<br>A full-service firm providing engineering, procurement, construction management, project management, controls & automation, and technical services to energy, manufacturing, and industrial clients nationwide | Industrial Machinery Manufacturing | 🇺🇸 Mobile | 1,954 | 1995 |
| 24 | [Gen II Fund Services](https://www.tamtam.ai/c/gen-ii-fund-services) (gen2fund.com)<br>A leading provider offering fund administration services to private capital asset managers and investors with over $1 trillion under administration | Financial Services | 🇺🇸 New York | 1,846 | 2009 |
| 25 | [Exadel](https://www.tamtam.ai/c/exadel) (exadel.com)<br>Global software consulting and development company helping enterprises transform businesses with end-to-end software solutions, design, engineering, and managed services. | Software Development | 🇺🇸 Walnut Creek | 1,816 | 1998 |
| 26 | [Davis Wright Tremaine LLP](https://www.tamtam.ai/c/davis-wright-tremaine-llp) (dwt.com)<br>This company offers custom-tailored service focusing on top-of-market excellence and innovation, partnering with clients to define success together | Law Practice | 🇺🇸 | 1,803 |  |
| 27 | [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 |
| 28 | [Rockefeller Capital Management](https://www.tamtam.ai/c/rockefeller-capital-management) (rcm.rockco.com)<br>Offers premier financial advisory, wealth, asset, and investment management, connecting clients to unique solutions and opportunities. Serves individuals, families, businesses, and institutions. | Financial Services | 🇺🇸 New York | 1,744 | 2018 |
| 29 | [Safeguard Global](https://www.tamtam.ai/c/safeguard-global) (safeguardglobal.com)<br>Building adaptive solutions for global organizations in workforce management, recruitment, payroll, onboarding, and more to enable smarter and efficient operations | Human Resources Services | 🇺🇸 Austin | 1,718 | 2008 |
| 30 | [Fried Frank](https://www.tamtam.ai/c/fried-frank) (friedfrank.com)<br>Advises leading corporations, investment funds, and financial institutions on their most critical legal needs and business opportunities globally. | Law Practice | 🇺🇸 New York | 1,690 | 1890 |
| 31 | [Dorsey & Whitney LLP](https://www.tamtam.ai/c/dorsey-and-whitney-llp) (dorsey.com)<br>Provides legal advice and business partnership to global companies, specializing in mergers and acquisitions, capital markets, and complex litigation across various industries since 1912. | Law Practice | 🇺🇸 Minneapolis | 1,611 | 1912 |
| 32 | [COLSA](https://www.tamtam.ai/c/colsa) (colsa.com)<br>A technology services company that provides engineering, IT, and programmatic solutions for Government and Commercial customers, focusing on innovation, integrity, and teamwork | Defense and Space Manufacturing | 🇺🇸 Huntsville | 1,535 | 1980 |
| 33 | [Stout](https://www.tamtam.ai/c/stout) (stout.com)<br>Global advisory firm specializing in corporate finance, accounting, transaction advisory, valuation, financial disputes, claims, and investigations for diverse clients. | Financial Services | 🇺🇸 Chicago | 1,484 | 1991 |
| 34 | [Bradley Arant Boult Cummings LLP](https://www.tamtam.ai/c/bradley-arant-boult-cummings-llp) (bradley.com)<br>A national law firm providing skilled legal services with exceptional client service and deep industry knowledge, tailored solutions for business clients | Law Practice | 🇺🇸 Birmingham | 1,462 | 1870 |
| 35 | [Tria Federal (Tria)](https://www.tamtam.ai/c/tria-federal-tria) (triafed.com)<br>Provides digital transformation solutions and advisory services to federal health and public safety agencies, addressing capability gaps for faster, smarter operations. | IT Services and IT Consulting | 🇺🇸 Arlington | 1,412 | 2022 |
| 36 | [Excel Sports Management](https://www.tamtam.ai/c/excel-sports-management) (excelsm.com)<br>Management and marketing agency representing top-tier sports talent, blue-chip brands, and marquee properties across multiple major cities. | Spectator Sports | 🇺🇸 | 1,407 | 2002 |
| 37 | [Auxis](https://www.tamtam.ai/c/auxis) (auxis.com)<br>Helps senior executives achieve peak back-office performance through nearshore outsourcing, cloud computing, shared services, RPA, and finance/IT solutions for cost savings and innovation. | Outsourcing and Offshoring Consulting | 🇺🇸 Fort Lauderdale | 1,398 | 1997 |
| 38 | [Torch Technologies, Inc.](https://www.tamtam.ai/c/torch-technologies-inc) (torchtechnologies.com)<br>Employee-owned business, consistently recognized for strong performance, positive workplace culture, and ethical practices in consulting and professional services. | Defense and Space Manufacturing | 🇺🇸 Huntsville | 1,338 | 2002 |
| 39 | [SEP](https://www.tamtam.ai/c/sep) (sep.com)<br>SEP develops high-quality software solutions for critical industries, creating impactful products with a team of skilled developers and designers Employee-owned and award-winning for its company culture | Software Development | 🇺🇸 Carmel | 1,310 | 1988 |
| 40 | [Volkert, Inc.](https://www.tamtam.ai/c/volkert-inc) (volkert.com)<br>A long-standing engineering firm providing design services in transportation, aviation, construction, public works, utilities, property acquisition, and environmental engineering | Civil Engineering | 🇺🇸 Mobile | 1,265 | 1925 |
| 41 | [One World Global Services LLC](https://www.tamtam.ai/c/one-world-global-services-llc) (oneworldglobalservices.com)<br>Provides translation, interpretation, and customer care services globally, bridging communication gaps for businesses and helping achieve international goals with cost-effective, on-time solutions. | Translation and Localization | 🇺🇸 Miami | 1,233 | 2015 |
| 42 | [Primary Services](https://www.tamtam.ai/c/primary-services) (primaryservices.com)<br>Connects accounting, IT, HR, marketing, and administrative professionals with contract, temp-to-perm, and direct-hire positions at Fortune 500 clients in Texas and Oklahoma. | Staffing and Recruiting | 🇺🇸 Houston | 1,215 | 1988 |
| 43 | [Alliance Technical Group](https://www.tamtam.ai/c/alliance-technical-group) (alliancetg.com)<br>A leading provider of source testing, emissions monitoring, and analytical services in the United States, offering quick proposals, regulatory compliance, and accurate testing | Environmental Services | 🇺🇸 Decatur | 1,196 | 2000 |
| 44 | [Ultimus Fund Solutions](https://www.tamtam.ai/c/ultimus-fund-solutions) (ultimusfundsolutions.com)<br>Provides comprehensive, tech-enhanced fund administration, accounting, middle office, and investor solutions for registered funds, private funds, and public plans, offering tailored services. | Financial Services | 🇺🇸 Cincinnati | 1,098 | 1999 |
| 45 | [Radiance Technologies](https://www.tamtam.ai/c/radiance-technologies) (radiancetech.com)<br>A 100% employee-owned small business prime contractor specializing in cyber solutions, systems engineering, technology development, intelligence community support, and government program support | Defense and Space Manufacturing | 🇺🇸 Huntsville | 1,081 | 1999 |
| 46 | [Yulista Holding LLC](https://www.tamtam.ai/c/yulista-holding-llc) (yulista.com)<br>A company in the aerospace and defense industry providing value-added solutions in aviation, ground, logistics, training, management support, engineering, and technical services | Aviation and Aerospace Component Manufacturing | 🇺🇸 Huntsville | 1,056 | 2002 |
| 47 | [3Cloud](https://www.tamtam.ai/c/3cloud) (3cloudsolutions.com)<br>Leading Microsoft Azure partner, offering expertise in infrastructure, data, analytics, and application innovation to solve complex business problems. | IT Services and IT Consulting | 🇺🇸 Downers Grove | 1,042 | 2016 |
| 48 | [EOS Worldwide](https://www.tamtam.ai/c/eos-worldwide) (eosworldwide.com)<br>Provides a business operating system, principles, and tools to entrepreneurial companies for frustration-free organization, growth, and strengthened key components. | Professional Training and Coaching | 🇺🇸 Ann Arbor | 1,010 | 2008 |
| 49 | [New York Life Investment Management](https://www.tamtam.ai/c/new-york-life-investment-management) (newyorklifeinvestments.com)<br>Global asset management business offering clients access to specialized investment teams through a family of affiliated boutiques Providing comprehensive investment solutions for clients | Financial Services | 🇺🇸 New York | 997 |  |
| 50 | [PRODENSA](https://www.tamtam.ai/c/prodensa) (prodensa.com)<br>Supports foreign investors in manufacturing industry with market analysis, expansions, site selection, real estate, startups, shelter, and consulting for ongoing operations. | Business Consulting and Services | 🇺🇸 | 992 | 1985 |

## 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 Alabama

- [The largest companies in Alabama](https://www.tamtam.ai/l/largest-companies-alabama) (2,140)
- [Multinational companies in Alabama](https://www.tamtam.ai/l/multinational-companies-alabama) (416)
- [Manufacturers in Alabama](https://www.tamtam.ai/l/manufacturers-alabama) (221)
- [Companies with in-house R&D in Alabama](https://www.tamtam.ai/l/r-and-d-companies-alabama) (214)
- [Financial services firms in Alabama](https://www.tamtam.ai/l/financial-services-firms-alabama) (209)
- [Retail chains in Alabama](https://www.tamtam.ai/l/retail-chains-alabama) (192)
- [Critical infrastructure operators in Alabama](https://www.tamtam.ai/l/critical-infrastructure-operators-alabama) (186)
- [Education providers in Alabama](https://www.tamtam.ai/l/education-companies-alabama) (173)
- [Hardware manufacturers in Alabama](https://www.tamtam.ai/l/hardware-companies-alabama) (156)
- [Companies with a mobile app in Alabama](https://www.tamtam.ai/l/companies-with-mobile-app-alabama) (156)
- [SaaS companies in Alabama](https://www.tamtam.ai/l/saas-companies-alabama) (147)
- [Financial Services companies in Alabama](https://www.tamtam.ai/l/financial-services-companies-alabama) (131)
- [Software Development companies in Alabama](https://www.tamtam.ai/l/software-development-companies-alabama) (130)
- [Healthcare providers in Alabama](https://www.tamtam.ai/l/healthcare-providers-alabama) (124)
- [Public sector organisations in Alabama](https://www.tamtam.ai/l/public-sector-organisations-alabama) (119)
- [AI companies in Alabama](https://www.tamtam.ai/l/ai-companies-alabama) (111)
- [Hospitals and Health Care companies in Alabama](https://www.tamtam.ai/l/hospitals-and-health-care-companies-alabama) (109)
- [Aerospace and defence companies in Alabama](https://www.tamtam.ai/l/aerospace-and-defense-companies-alabama) (104)
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- [IT services companies in Alabama](https://www.tamtam.ai/l/it-services-companies-alabama) (90)
- [Higher Education companies in Alabama](https://www.tamtam.ai/l/higher-education-companies-alabama) (89)
- [Corporate groups and holding companies in Alabama](https://www.tamtam.ai/l/holding-companies-alabama) (89)
- [Publicly traded companies in Alabama](https://www.tamtam.ai/l/publicly-traded-companies-alabama) (85)

## 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 New York State](https://www.tamtam.ai/l/professional-services-firms-new-york-state) (955)
- [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)
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- [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)

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