This selection of professional services firms in Michigan includes several large, established companies, many of which provide IT services, business consulting, or specialized staffing and educational support. For example, HTC Global Services and Atos Syntel offer IT and business process services, while Kelly Education and Edustaff specialize in educational staffing. RGIS provides retail merchandising services, and Plante Moran is a professional services firm focusing on audit, tax, consulting, and wealth management.
A notable pattern among these firms is the strong presence of companies catering to the automotive industry, such as MSX International and Caresoft Global, reflecting Michigan's industrial heritage. There is also a concentration of headquarters in cities like Troy, Ann Arbor, and Detroit.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Gi Groupgigroup.com
Providing temporary, permanent, professional staffing, executive search, outsourcing, training, outplacement, and HR consultancy services worldwide across multiple industries. |
17,915 | |||
| 2 | 12,544 | ||||
| 3 |
HTC Global Serviceshtcinc.com
Provider of IT and business process services using emerging technologies to enable clients' digital transformation and sustainable growth. |
10,143 | |||
| 4 |
Kelly Educationkellyeducation.com
A leading workforce solutions company in education, specializing in placing talent from early childhood to higher education, including leadership roles |
9,490 | |||
| 5 |
Atos Syntelatos-syntel.net
Providing integrated IT and knowledge process services, focusing on automation, agile, cloud, analytics, IoT, and long-term client partnerships. |
6,789 | |||
| 6 |
Edustaffedustaff.org
An educational staffing company providing consolidated HR services to school districts, committed to innovation, excellence, and leaving a positive impact |
6,116 | |||
| 7 |
Plante Moranplantemoran.com
Professional services firm specializing in audit, tax, consulting, and wealth management with a strong focus on client relationships and support. |
4,664 | |||
| 8 |
MSX Internationalmsxi.com
This company partners with automotive OEMs and mobility companies, providing support in retail strategies, dealer performance, repair optimization, and consumer engagement |
4,448 | |||
| 9 | 3,397 | ||||
| 10 |
MMSmmsholdings.com
A global CRO specializing in clinical research services for pharmaceutical and biotech companies, focused on innovation, quality, and delivering life-changing therapies |
3,136 | |||
| 11 |
Miracle Software Systems, Incmiraclesoft.com
Global IT services company delivering innovative solutions across Cloud, Application Development, Automation, Data Analytics, Integration, Cognitive, and Digital Experience technologies with strategic partnerships |
2,689 | |||
| 12 |
Project Worldwideproject.com
Creative alliance combining multiple agencies focused on ambitious collaboration and meaningful work through hyperconnected creativity and diverse marketing expertise. |
2,678 | |||
| 13 |
PINKERTON | Comprehensive Risk Managementpinkerton.com
A global provider of security and risk management solutions with a strong reputation, offering a wide range of services worldwide |
2,119 | |||
| 14 |
SmithGroupsmithgroup.com
Innovative design & engineering firm using research, technology, and design thinking to tackle challenges in architecture, engineering, and environmental science globally |
1,926 | |||
| 15 |
Caresoft Globalcaresoftglobal.com
Global engineering solutions company partnering with automotive and equipment manufacturers to address product development, cost optimization, manufacturing, and aftermarket needs with specialized expertise and experience |
1,820 | |||
| 16 |
George P Johnson Experience Marketinggpj.com
Strategic experience marketing agency creating integrated experiential programs through digital, mobile, and physical brand activations to accelerate relationships with customers and industry influencers. |
1,722 | |||
| 17 |
Atwell, LLCatwell.com
Full-service consulting, engineering, and construction firm providing customized solutions for real estate, land development, power, energy, and oil markets. |
1,673 | |||
| 18 |
Infotree Global Solutionsinfotreeglobal.com
Connecting top talent with leading companies globally, specializing in IT, engineering, clinical, skilled trades, finance, and accounting sectors. |
1,627 | |||
| 19 |
Creative Synergies Groupglobal-csg.com
A leading digital innovation solution provider, leveraging expertise and NextGen technologies to empower global customers in Industry 40 revolution |
1,617 | |||
| 20 |
Clark Hill Lawclarkhill.com
A diverse and talented team at the forefront of legal services, partnering with clients to achieve their business objectives in varied locations |
1,579 | |||
| 21 |
KellyOCGkellyocg.com
Global advisor of talent supply chain strategies and workforce solutions, aligning talent strategy with business goals to help companies and careers thrive |
1,544 | |||
| 22 |
Rehmannrehmann.com
A professional advisory firm offering accounting, assurance, business solutions, specialized consulting, and wealth management services with over 80 years of experience |
1,415 | |||
| 23 |
Kelly Science, Engineering, Technology & Telecomset.kellyservices.us
Helping companies adapt and succeed through their people, Kelly Science, Engineering and Technology provides innovative solutions for success |
1,412 | |||
| 24 |
The Private Firmthefirm.net
The Private Firm provides experienced legal services to business owners, executives, and managers, helping them navigate opportunities, overcome difficulties, and achieve their goals |
1,354 | |||
| 25 |
Escalentescalent.co
A data analytics and advisory firm guiding leading brands in various industries through market insights to drive growth and transformation |
1,315 | |||
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. | |||||
| 26 |
Netlink Software Group America Incnetlink.com
A global technology services provider delivering innovative solutions in automation, ERP, BI & analytics, AI, cloud, mobility, BPO, ESG management, and more |
1,309 | |||
| 27 |
ICONMAiconma.com
A woman-owned staffing company providing professional staffing services, project-based solutions, and a wide range of expertise to Fortune 500 organizations globally |
1,272 | |||
| 28 |
CCI Systemsccisystems.com
An employee-owned solution provider offering telecommunications solutions, network assessments, engineering, drafting, design services, and 24/7 support to achieve strategic goals |
1,256 | |||
| 29 |
Dickinson Wrightdickinson-wright.com
A full-service legal firm with over 500 lawyers, offering unmatched client service and high-quality advice in 40 practice areas globally |
1,243 | |||
| 30 |
Second To Nonesecond-to-none.com
Empowering customer-centric companies to create authentic experiences through mystery shopping, compliance, and voice of customer solutions for diverse sectors |
1,223 | |||
| 31 |
Strategic Staffing Solutionsstrategicstaff.com
A global IT consulting and business services corporation offering staff augmentation, managed services, workforce management, and recruiting with industry expertise |
1,205 | |||
| 32 | 1,198 | ||||
| 33 |
Global LT, Inc.global-lt.com
A leading expert in Language Solutions and Expatriate Services, offering training, translation, interpretation, and destination services worldwide since 1979 |
1,098 | |||
| 34 |
GalaxE.Solutionsinfo.endava.com
Global professional services company offering a variety of services under well-known brands, focused on outsourcing and technology solutions |
1,092 | |||
| 35 |
Altran Engineering Solutionsaltranengineeringsolutions.com
Global engineering solutions provider offering services in transportation, consumer, industrial, and medical sectors Specializing in embedded systems, design, prototyping, testing, and manufacturing |
1,090 | |||
| 36 |
Production Modeling Corporation (PMC)pmcorp.com
Since 1979, PMC has provided expert software, consulting, training, support, and staffing solutions for operations, engineering, supply chain management, and more |
931 | |||
| 37 |
Doeren Mayhewdoeren.com
Professionals providing guidance and direction to businesses and nonprofit organizations to traverse complex business terrain. Offers audit, tax, and business consulting services. |
929 | |||
| 38 | 911 | ||||
| 39 |
Honigman LLPhonigman.com
Leading business law firm with extensive experience counseling clients in various legal areas, known for innovative approaches, exceptional client service, and top-tier practice rankings |
892 | |||
| 40 |
Health Management Associateshealthmanagement.com
Health Management Associates is a national research and consulting firm specializing in health care program and policy issues for various organizations |
882 | |||
| 41 |
OneMagnifyonemagnify.com
Innovative company combining technology, creativity, and analytics to help build and transform brands that are making a global impact |
834 | |||
| 42 |
Wade Trimwadetrim.com
The company specializes in solving engineering challenges to enhance infrastructure, create stronger communities, and deliver customized solutions with excellent communication |
817 | |||
| 43 |
Urban Scienceurbanscience.com
Provide scientific analysis and insights to solve automotive market challenges, helping clients improve targeting, sales, market share, and profitability. |
812 | |||
| 44 |
Multi-Training Systems LLCmtsinfo.com
A learning organization specializing in diversity, equity, and inclusion training and consulting for individuals, teams, and organizations across various industries |
790 | |||
| 45 |
Trillium Staffing Solutionstrilliumstaffing.com
An employment service specializing in staffing, training, on-site services, human resources, and safety consulting, dedicated to providing quality employees and service |
779 | |||
| 46 |
OHM Advisorsohm-advisors.com
AEP firm specializing in community advancement through multidisciplinary teamwork in architecture, engineering, and planning Award-winning work creating great places |
754 | |||
| 47 |
TekWissen 庐tekwissen.com
Global provider of technology consulting, workforce management, and recruitment solutions with a focus on exceeding client expectations and driving innovation |
749 | |||
| 48 |
Ghafari Associatesghafari.com
Since 1982, this company offers integrated design solutions for various sectors globally, with services in architecture, engineering, and operations |
741 | |||
| 49 |
Populus Grouppopulusgroup.com
A company specializing in managing contingent workforces, offering payroll, MSP, staffing, and recruitment services with a focus on diversity and opportunity for all |
704 | |||
| 50 |
Job Centerjobcentermichigan.com
A family-owned staffing company serving Metro Detroit and surrounding areas since 1983, specializing in temporary-to-hire placements |
703 | |||
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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.
More company lists in Michigan
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- Companies with in-house R&D in Michigan 287
- Motor Vehicle Manufacturing companies in Michigan 248
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The same list elsewhere in United States
- Professional services firms in the United States 7,078
- Professional services firms in New York State 955
- Professional services firms in California 880
- Professional services firms in Texas 629
- Professional services firms in Florida 375
- Professional services firms in Virginia 344
- Professional services firms in Illinois 339
- Professional services firms in Massachusetts 249
- Professional services firms in New Jersey 249
- Professional services firms in Georgia 246
- Professional services firms in Pennsylvania 245
- Professional services firms in Ohio 195
- Professional services firms in Maryland 176
- Professional services firms in Washington State 163
- Professional services firms in North Carolina 142
- Professional services firms in Alabama 135
- Professional services firms in Minnesota 125
- Professional services firms in New York 735
- Professional services firms in Chicago 196
- Professional services firms in Houston 156
- Professional services firms in Atlanta 143
- Professional services firms in San Francisco 130
- Professional services firms in Washington 109
- Professional services firms in Los Angeles 108