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Top 50 professional services firms in Indiana

Tamtam tracks 69 professional services firms headquartered in Indiana. This list ranks the 50 largest by number of employees on LinkedIn, led by Elwood Staffing Services, Inc., TRIMEDX and Brooksource. Their median headcount is 493. Half of them were founded in 1994 or later. The most common headquarters are Indianapolis (31), Carmel (4) and Fishers (3).

馃嚭馃嚫 Indiana50 companiesUpdated Nov 11, 2026

These Indiana-based professional services firms are predominantly large companies, with headcounts ranging from approximately 900 to over 4,000 employees. The sector is characterized by a strong presence of staffing and recruiting companies, alongside IT services, healthcare, and engineering. Elwood Staffing Services, Inc. provides job placement and workforce management solutions, while TRIMEDX specializes in clinical asset management and medical device cybersecurity. Brooksource offers engineering and technology solutions, and Barnes & Thornburg LLP provides legal services. Qualus focuses on innovative power services, and CAI provides engineering and project management to various industries.

The data reveals a significant concentration of headquarters in Indianapolis, with nine out of the fifteen largest companies located there. Other key cities include Columbus, Fishers, Carmel, and South Bend. The founding dates of these companies span from 1942 to 2009, with a notable cluster of firms established around the late 1990s and early 2000s, indicating a period of growth and development in the professional services sector in Indiana.

#CompanyIndustryHeadquarters EmployeesFounded
1
Elwood Staffing Services, Inc.elwoodstaffing.com

A trusted company since 1980, offering job placement and workforce management solutions including temporary, direct hire, and recruitment process outsourcing services

Staffing and Recruiting 馃嚭馃嚫 Columbus 4,143 1980
2
TRIMEDXtrimedx.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 馃嚭馃嚫 Indianapolis 2,721 1998
3
Brooksourcebrooksource.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 馃嚭馃嚫 Indianapolis 2,497 2000
4
MS Companiesmscompanies.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 馃嚭馃嚫 Indianapolis 2,236 1999
5
Barnes & Thornburg LLPbtlaw.com

Over 800 legal professionals in 23 offices provide expert legal services across disciplines, supporting businesses in a dynamic marketplace.

Law Practice 馃嚭馃嚫 Indianapolis 2,028 n/a
6
Eight Eleven Groupeightelevengroup.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 馃嚭馃嚫 Indianapolis 1,877 2000
7
LGC Staffinglgcassociates.com

Dedicated team creating connections between clients and candidates, promoting diversity, inclusion, economic empowerment, and respect in staffing industry

Staffing and Recruiting 馃嚭馃嚫 Indianapolis 1,760 2003
8
Stratosphere Qualitystratospherequality.com

Global provider of quality assurance solutions to manufacturers in automotive, medical device, electronics, home appliance, and recreational vehicle industries, helping minimize defects and reduce costs

Outsourcing and Offshoring Consulting 馃嚭馃嚫 Fishers 1,740 2009
9
Qualusqualuscorp.com

Innovative power services firm specializing in grid modernization, resiliency, sustainability, and software solutions for utilities, commercial, industrial, and government clients

Engineering Services 馃嚭馃嚫 Usa 1,668 n/a
10
BCforwardbcforward.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 馃嚭馃嚫 Indianapolis 1,662 1998
11
Peoplelink Grouppeoplelinkgroup.com

A staffing group based in South Bend, IN, providing contract staff to companies nationwide Mission to link business and people, with customer-centric values

Staffing and Recruiting 馃嚭馃嚫 South Bend 1,205 1987
12
ACESacespower.com

A nationwide energy management company helping clients navigate and mitigate risks in the US energy markets without owning any energy commodities

Utilities 馃嚭馃嚫 Carmel 1,194 1999
13
CAIcaiready.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 馃嚭馃嚫 Indianapolis 1,105 n/a
14
Medasourcemedasource.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 馃嚭馃嚫 Indianapolis 997 2000
15
KSM (Katz, Sapper & 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 馃嚭馃嚫 Indianapolis 915 1942
16
Ice Miller LLPicemiller.com

Provides comprehensive legal services with a focus on understanding client needs to build, grow, and protect valuable assets.

Law Practice 馃嚭馃嚫 Indianapolis 891 1910
17
American Structurepointstructurepoint.com

Providing innovative engineering, design, and consulting services across various disciplines to support projects from concept through completion.

Civil Engineering 馃嚭馃嚫 Indianapolis 767 1966
18
Blue & Co., LLCblueandco.com

Blue & Co provides a wide range of professional services including auditing, business planning, financial controls, and litigation support to help clients succeed

Accounting 馃嚭馃嚫 Carmel 626 1970
19
Employment Plusemploymentplus.com

A staffing and recruiting solutions provider with over 20 years of experience, offering industry-specific services to drive business results and client satisfaction

Staffing and Recruiting 馃嚭馃嚫 Bloomington 619 1993
20
Gibsonthegibsonedge.com

A consulting firm specializing in proactive insurance solutions for companies seeking growth, differentiation in the market, and risk preparation

Insurance 馃嚭馃嚫 South Bend 610 1933
21
Peoplelink Staffing Solutionspeoplelinkstaffing.com

Strategic staffing solutions provider focused on driving productivity and profitability with a customer-centric, data-driven approach and a commitment to staff development and success

Staffing and Recruiting 馃嚭馃嚫 South Bend 597 1987
22
Safety Management Groupsafetymanagementgroup.com

QHSE consultants focused on reducing risk, promoting sustainable operations, and enhancing safety culture to protect people, assets, and communities globally

Construction 馃嚭馃嚫 Indianapolis 565 1991
23
Knowledge Servicesknowledgeservices.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 馃嚭馃嚫 Indianapolis 535 1994
24
Core BTSnri-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 馃嚭馃嚫 Indianapolis 503 2004
25
iLABilabquality.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 馃嚭馃嚫 Indianapolis 493 1995

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26
enVistaenvistacorp.com

A leading consulting firm providing supply chain, technology, and IT services with expertise in automation, robotics, Microsoft solutions, and managed services

Business Consulting and Services 馃嚭馃嚫 Carmel 482 2002
27
NCWteamncw.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 馃嚭馃嚫 Indianapolis 478 2000
28
Resultantresultant.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 馃嚭馃嚫 Indianapolis 454 2008
29
Energy Systems Group (ESG)energysystemsgroup.com

A leading sustainable energy solutions provider specializing in energy efficiency, sustainability, resiliency, and infrastructure improvement for various sectors

Engineering Services 馃嚭馃嚫 Newburgh 442 1994
30
Lochmueller Grouplochgroup.com

Employee-owned firm providing survey, planning, engineering, environmental services, data collection, modeling, public involvement, design, and construction oversight nationwide.

Civil Engineering 馃嚭馃嚫 Evansville 401 1980
31
Diverse Staffingdiversestaffing.com

Provides contingent employment solutions and HR services across industries using hybrid recruiting to deliver top talent efficiently.

Staffing and Recruiting 馃嚭馃嚫 Indianapolis 397 1999
32
Hall Renderhallrender.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 馃嚭馃嚫 Indianapolis 394 1967
33
Sales Xceleration庐salesxceleration.com

Sales Xceleration helps clients increase sales through a proven Sales Operating Management System, outsourced VP of Sales guidance, and tailored growth plans

Business Consulting and Services 馃嚭馃嚫 Fishers 391 2011
34
TRISTARstar3.com

A veteran-owned professional services company specializing in electronic warfare, cybersecurity, IT, and technical solutions for Department of Defense programs

Defense and Space Manufacturing 馃嚭馃嚫 Bloomington 390 1995
35
INNOVATIVEinnovativei.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 馃嚭馃嚫 Indianapolis 388 1993
36
DOZdozllc.com

DOZ offers accounting, consulting, and tax services to owners of multifamily housing, senior living facilities, commercial properties, and residential land developments, specializing in HUD and Low Income Housing Tax Credit projects

Accounting 馃嚭馃嚫 Carmel 369 1987
37
First Call Staffingfirstcallinc.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 馃嚭馃嚫 Indianapolis 343 1991
38
Morales Group, Incmoralesgroup.net

Nationally recognized Indianapolis-based MBE staffing company offering diverse solutions for various staffing needs, enhancing business agility, productivity, and competitiveness

Staffing and Recruiting 馃嚭馃嚫 Indianapolis 335 2003
39
BSA LifeStructuresbsalifestructures.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 馃嚭馃嚫 Indianapolis 324 1975
40
Veristaverista.com

A leading consultancy firm providing systems, compliance, validation, and quality solutions to life science companies, improving health and lives through advanced technologies

Pharmaceutical Manufacturing 馃嚭馃嚫 Fishers 323 2020
41
Syneos Healthsyneoshealth.com

A fully integrated biopharmaceutical solutions organization accelerating customer success by combining clinical, medical, and commercial capabilities worldwide

Business Consulting and Services 馃嚭馃嚫 Hammond 320 n/a
42
Kemper CPA Group LLPkempercpa.com

A client-centric accounting firm offering diverse solutions, including technology consulting, capital management, and payroll services, focused on exceeding expectations

Accounting 馃嚭馃嚫 Evansville 320 1958
43
Cloud Accountant Staffing - Careerscloudaccountantstaffing.com

Specialized in accounting firm outsourcing, offering skilled offshore team members in the Philippines from bookkeepers to experienced CPAs

Staffing and Recruiting 馃嚭馃嚫 Indianapolis 295 2021
44
Moser Consultingmoserit.com

Technology solutions company specializing in big data, managed services, IT consulting, custom application development, and employee learning services.

IT Services and IT Consulting 馃嚭馃嚫 Indianapolis 290 1996
45
CBIZ SomersetSomersetCPAs.com

This company provides personalized financial guidance for clients of all sizes, combining expertise with a personal approach to meet individual needs

Accounting 馃嚭馃嚫 Indianapolis 263 1960
46
LER TechForcelertechforce.com

An engineering firm with over 350 staff, focusing on employee success, backed by a global leader in functional safety consulting Owned and operated by women

Engineering Services 馃嚭馃嚫 Columbus 219 n/a
47
Butler, Fairman & 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 馃嚭馃嚫 Indianapolis 212 1961
48
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 馃嚭馃嚫 Indianapolis 196 n/a
49
CSO Architectscsoinc.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 馃嚭馃嚫 Indianapolis 186 1961
50
Schmidt Associatesschmidt-arch.com

Passionate team of architects, engineers, and interior designers creating inspiring spaces for schools, hospitals, community centers, and corporate offices #design #architecture #engineering

Architecture and Planning 馃嚭馃嚫 Indianapolis 182 1976

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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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