# Professional services firms headquartered in Indianapolis
Tamtam tracks 37 professional services firms headquartered in Indianapolis. This list ranks the 30 largest by number of employees on LinkedIn, led by TRIMEDX, Brooksource and MS Companies. Their median headcount is 503. Half of them were founded in 1996 or later.
The professional services sector in Indianapolis is characterized by a mix of established firms and companies founded around the turn of the millennium. Several companies specialize in IT services and staffing, such as Brooksource, which provides engineering and technology solutions, and Eight Eleven Group, focused on IT, engineering, healthcare, and business support services. Other notable firms include TRIMEDX in clinical asset management and Barnes & Thornburg LLP, offering legal services.
This collection of companies shows a concentration of professional services with a strong emphasis on technology, healthcare support, and workforce solutions. Many of the listed companies, like MS Companies and BCforward, are headquartered in Indianapolis, indicating a local hub for these specialized services. The presence of law firms and accounting services further diversifies the professional landscape.
๐บ๐ธ Indianapolis ยท 30 companies ยท Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [TRIMEDX](https://www.tamtam.ai/c/trimedx) (trimedx.com)
Industry-leading provider of clinical asset management, clinical engineering services, asset informatics, and medical device cybersecurity to healthcare providers Transformational, cost-effective solutions for patient care | Hospitals and Health Care | ๐บ๐ธ Indianapolis | 2,721 | 1998 |
| 2 | [Brooksource](https://www.tamtam.ai/c/brooksource) (brooksource.com)
Trusted provider of Engineering & Technology solutions for Fortune 500 organizations, emphasizing Experience-Driven Staffing, Professional Services, and Workforce Transformation | IT Services and IT Consulting | ๐บ๐ธ Indianapolis | 2,497 | 2000 |
| 3 | [MS Companies](https://www.tamtam.ai/c/ms-companies) (mscompanies.com)
A data-driven technology company providing workforce solutions to OEMs and tiered suppliers, specializing in advisory, quality representation, inspection, and talent management services | Professional Services | ๐บ๐ธ Indianapolis | 2,236 | 1999 |
| 4 | [Barnes & Thornburg LLP](https://www.tamtam.ai/c/barnes-and-thornburg-llp) (btlaw.com)
Over 800 legal professionals in 23 offices provide expert legal services across disciplines, supporting businesses in a dynamic marketplace. | Law Practice | ๐บ๐ธ Indianapolis | 2,028 | |
| 5 | [Eight Eleven Group](https://www.tamtam.ai/c/eight-eleven-group) (eightelevengroup.com)
Eight Eleven Group provides IT, engineering, healthcare, and business support services nationwide, focusing on creating great experiences for clients, consultants, and employees | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 1,877 | 2000 |
| 6 | [LGC Staffing](https://www.tamtam.ai/c/lgc-staffing) (lgcassociates.com)
Dedicated team creating connections between clients and candidates, promoting diversity, inclusion, economic empowerment, and respect in staffing industry | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 1,760 | 2003 |
| 7 | [BCforward](https://www.tamtam.ai/c/bcforward) (bcforward.com)
Global talent community empowering job seekers worldwide to advance careers and help organizations achieve goals in various industries Headquarters in Indianapolis and Hyderabad | IT Services and IT Consulting | ๐บ๐ธ Indianapolis | 1,662 | 1998 |
| 8 | [CAI](https://www.tamtam.ai/c/cai-indianapolis) (caiready.com)
Trusted global experts providing engineers, project managers, and technicians to efficiently startup projects, lower costs, and drive speed to patient in various industries | Pharmaceutical Manufacturing | ๐บ๐ธ Indianapolis | 1,105 | |
| 9 | [Medasource](https://www.tamtam.ai/c/medasource) (medasource.com)
Leading consulting and professional services provider in healthcare industry, offering services to Life Sciences, RCM/Payers, Technology, and Government sectors | Hospitals and Health Care | ๐บ๐ธ Indianapolis | 997 | 2000 |
| 10 | [KSM (Katz, Sapper & Miller)](https://www.tamtam.ai/c/ksm-katz-sapper-and-miller) (ksmcpa.com)
A nationally recognized firm offering advisory, tax, and audit services, leveraging technology and diverse perspectives to help clients thrive and innovate | Accounting | ๐บ๐ธ Indianapolis | 915 | 1942 |
| 11 | [Ice Miller LLP](https://www.tamtam.ai/c/ice-miller-llp) (icemiller.com)
Provides comprehensive legal services with a focus on understanding client needs to build, grow, and protect valuable assets. | Law Practice | ๐บ๐ธ Indianapolis | 891 | 1910 |
| 12 | [American Structurepoint](https://www.tamtam.ai/c/american-structurepoint) (structurepoint.com)
Providing innovative engineering, design, and consulting services across various disciplines to support projects from concept through completion. | Civil Engineering | ๐บ๐ธ Indianapolis | 767 | 1966 |
| 13 | [Safety Management Group](https://www.tamtam.ai/c/safety-management-group) (safetymanagementgroup.com)
QHSE consultants focused on reducing risk, promoting sustainable operations, and enhancing safety culture to protect people, assets, and communities globally | Construction | ๐บ๐ธ Indianapolis | 565 | 1991 |
| 14 | [Knowledge Services](https://www.tamtam.ai/c/knowledge-services) (knowledgeservices.com)
A woman-owned business providing state-of-the-art technology and services for workforce management, vendor management, cybersecurity, and staffing solutions to government organizations nationwide | IT Services and IT Consulting | ๐บ๐ธ Indianapolis | 535 | 1994 |
| 15 | [Core BTS](https://www.tamtam.ai/c/core-bts) (nri-na.com)
A full-service digital transformation consulting firm that helps clients solve challenges and achieve business outcomes through integrated solutions | IT Services and IT Consulting | ๐บ๐ธ Indianapolis | 503 | 2004 |
| 16 | [iLAB](https://www.tamtam.ai/c/ilab-indianapolis) (ilabquality.com)
iLAB specializes in providing global Software Quality Assurance services, including Quality Management, Testing, Project Management, and IT Consulting, with a focus on continuous learning and innovation | IT Services and IT Consulting | ๐บ๐ธ Indianapolis | 493 | 1995 |
| 17 | [NCW](https://www.tamtam.ai/c/ncw) (teamncw.com)
Professional recruiting and staffing company with over 20 years of experience, focusing on employee development, client needs, and process streamlining in various industries | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 478 | 2000 |
| 18 | [Resultant](https://www.tamtam.ai/c/resultant) (resultant.com)
Collaborative team combining engineering, data analysis, and consulting to solve complex challenges and empower clients in public and private sectors. | Business Consulting and Services | ๐บ๐ธ Indianapolis | 454 | 2008 |
| 19 | [Diverse Staffing](https://www.tamtam.ai/c/diverse-staffing) (diversestaffing.com)
Provides contingent employment solutions and HR services across industries using hybrid recruiting to deliver top talent efficiently. | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 397 | 1999 |
| 20 | [Hall Render](https://www.tamtam.ai/c/hall-render) (hallrender.com)
National health care law firm providing top legal counsel to health systems, hospitals, physicians, and other industry partners on regulatory, compliance, and operational issues | Law Practice | ๐บ๐ธ Indianapolis | 394 | 1967 |
| 21 | [INNOVATIVE](https://www.tamtam.ai/c/innovative) (innovativei.com)
A creative agency specializing in storytelling, problem-solving, and brand development through innovative solutions since 1993 Offering services in design, copywriting, and more | Advertising Services | ๐บ๐ธ Indianapolis | 388 | 1993 |
| 22 | [First Call Staffing](https://www.tamtam.ai/c/first-call-staffing) (firstcallinc.com)
A women-owned staffing company that serves multiple industries, offering staffing, quality control, supplies, and professional services with a focus on ethics and customer satisfaction | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 343 | 1991 |
| 23 | [Morales Group, Inc](https://www.tamtam.ai/c/morales-group-inc) (moralesgroup.net)
Nationally recognized Indianapolis-based MBE staffing company offering diverse solutions for various staffing needs, enhancing business agility, productivity, and competitiveness | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 335 | 2003 |
| 24 | [BSA LifeStructures](https://www.tamtam.ai/c/bsa-lifestructures) (bsalifestructures.com)
An interdisciplinary design firm specializing in creating innovative spaces for healing, learning, and discovery through architecture, engineering, interior design, and planning services | Architecture and Planning | ๐บ๐ธ Indianapolis | 324 | 1975 |
| 25 | [Cloud Accountant Staffing - Careers](https://www.tamtam.ai/c/cloud-accountant-staffing-careers) (cloudaccountantstaffing.com)
Specialized in accounting firm outsourcing, offering skilled offshore team members in the Philippines from bookkeepers to experienced CPAs | Staffing and Recruiting | ๐บ๐ธ Indianapolis | 295 | 2021 |
| 26 | [Moser Consulting](https://www.tamtam.ai/c/moser-consulting) (moserit.com)
Technology solutions company specializing in big data, managed services, IT consulting, custom application development, and employee learning services. | IT Services and IT Consulting | ๐บ๐ธ Indianapolis | 290 | 1996 |
| 27 | [CBIZ Somerset](https://www.tamtam.ai/c/cbiz-somerset) (SomersetCPAs.com)
This company provides personalized financial guidance for clients of all sizes, combining expertise with a personal approach to meet individual needs | Accounting | ๐บ๐ธ Indianapolis | 263 | 1960 |
| 28 | [Butler, Fairman & Seufert, Inc.](https://www.tamtam.ai/c/butler-fairman-and-seufert-inc) (bfsengr.com)
A leading civil engineering firm providing exceptional services to governments and businesses through communication, teamwork, and innovative approaches for successful projects | Civil Engineering | ๐บ๐ธ Indianapolis | 212 | 1961 |
| 29 | [Indiana Legal Services, Inc.](https://www.tamtam.ai/c/indiana-legal-services-inc) (indianalegalservices.org)
A nonprofit law firm in Indiana provides free civil legal assistance to low-income individuals facing challenges with basic needs | Law Practice | ๐บ๐ธ Indianapolis | 196 | |
| 30 | [CSO Architects](https://www.tamtam.ai/c/cso-architects) (csoinc.net)
A design firm committed to excellence, integrity, and service in creating civic, corporate, educational, hotel, health, and research facilities in Indiana | Architecture and Planning | ๐บ๐ธ Indianapolis | 186 | 1961 |
## 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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## 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)
- [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)
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Source: https://www.tamtam.ai/l/professional-services-firms-indianapolis