# The 35 largest managed service providers in Illinois
Tamtam tracks 35 managed service providers headquartered in Illinois. This list ranks all of them by number of employees on LinkedIn, led by YASH Technologies, AHEAD and Ensono. Their median headcount is 196. Half of them were founded in 2002 or later. The most common headquarters are Chicago (16), Downers Grove (2) and Naperville (2).
These Illinois-based companies are managed service providers, predominantly offering IT services and consulting. They range from large established firms like YASH Technologies, a global digital transformation partner with 8,670 employees, to mid-sized companies such as AHEAD, specializing in digital platform management, and Ensono, a technology adviser for digital transformation. CyberTech Systems and Software focuses on Enterprise Cloud Transformation, while Sentinel Technologies provides IT solutions with an emphasis on communication and data centers.
The data shows a strong concentration of these companies in the Chicago metropolitan area, including headquarters in Chicago itself, Downers Grove, Oak Brook, and Bannockburn. Many of these firms were founded between the late 1980s and early 2000s, indicating a mature sector with a mix of experience in providing IT, cybersecurity, and cloud solutions.
๐บ๐ธ Illinois ยท 35 companies ยท Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [YASH Technologies](https://www.tamtam.ai/c/yash-technologies) (yash.com)
Consulting-led digital transformation partner offering technology, advisory, and outsourcing services to optimize client performance and revenue growth globally. | IT Services and IT Consulting | ๐บ๐ธ East Moline | 8,670 | 1996 |
| 2 | [AHEAD](https://www.tamtam.ai/c/ahead-chicago) (ahead.com)
This company specializes in building and managing digital platforms for successful organizations, accelerating the impact of technology through innovative solutions and engineering expertise | IT Services and IT Consulting | ๐บ๐ธ Chicago | 4,223 | |
| 3 | [Ensono](https://www.tamtam.ai/c/ensono) (ensono.com)
Ensono is a technology adviser and managed service provider, specializing in digital transformation, cloud migration, and application modernization for businesses worldwide | IT Services and IT Consulting | ๐บ๐ธ Downers Grove | 3,646 | 1969 |
| 4 | [CyberTech Systems and Software, Inc](https://www.tamtam.ai/c/cybertech-systems-and-software-inc) (cybertech.com)
Specializing in Enterprise Cloud Transformation, providing Cloud-based SAP and Esri ArcGIS solutions for improved customer experiences, real-time insights, productivity, and spatial analytics integration | IT Services and IT Consulting | ๐บ๐ธ Oak Brook | 860 | 1994 |
| 5 | [Sentinel Technologies](https://www.tamtam.ai/c/sentinel-technologies) (sentinel.com)
Leader in IT solutions with focus on innovative, practical services for communication, data center, cloud, and managed services Recognized for employee commitment and growth | IT Services and IT Consulting | ๐บ๐ธ Downers Grove | 791 | 1982 |
| 6 | [Netrix Global](https://www.tamtam.ai/c/netrix-global) (netrixglobal.com)
A global provider of cybersecurity, application development, and IT managed services, recognized for its award-winning solutions | IT Services and IT Consulting | ๐บ๐ธ Bannockburn | 771 | 1989 |
| 7 | [Impact Networking, LLC](https://www.tamtam.ai/c/impact-networking-llc) (impactmybiz.com)
Providing expert-driven managed services including IT, cybersecurity, marketing, AI, and digital transformation to help businesses grow and succeed. | IT Services and IT Consulting | ๐บ๐ธ Lake Forest | 764 | 1999 |
| 8 | [Cloud5 Communications](https://www.tamtam.ai/c/cloud5-communications) (cloud5.com)
Cloud5 helps hotels, apartment buildings, and service companies enhance customer experiences with Internet, Wi-Fi, Telephony, IT, and Contact Center services, driving revenue and loyalty | Technology, Information and Internet | ๐บ๐ธ Chicago | 613 | |
| 9 | [Netrix](https://www.tamtam.ai/c/netrix) (netrixllc.com)
A global provider of cybersecurity, application development, and IT managed services, recognized for its award-winning solutions | IT Services and IT Consulting | ๐บ๐ธ Bannockburn | 586 | |
| 10 | [Meridian Group International, Inc.](https://www.tamtam.ai/c/meridian-group-international-inc) (themeridian.com)
Providing global IT services including cybersecurity, cloud, application development, vendor management, and financial solutions to optimize business performance. | IT Services and IT Consulting | ๐บ๐ธ Deerfield | 577 | 1979 |
| 11 | [TECEZE](https://www.tamtam.ai/c/teceze) (teceze.com)
IT service provider offering a wide range of solutions, including IT managed services, hardware supply, AV solutions, remote working, security protection, and more | IT Services and IT Consulting | ๐บ๐ธ Chicago | 428 | 2012 |
| 12 | [SDI Presence](https://www.tamtam.ai/c/sdi-presence) (sdipresence.com)
IT consultancy and managed services provider offering strategic services, IT consulting, and hybrid multicloud infrastructure solutions to optimize technology environments for various industries | IT Services and IT Consulting | ๐บ๐ธ Chicago | 411 | 2016 |
| 13 | [Ascend Technologies](https://www.tamtam.ai/c/ascend-technologies) (teamascend.com)
An award-winning MSP in Chicago offering cybersecurity, infrastructure, and Salesforce solutions, with a focus on innovation, expertise, and exceptional service Join #TeamAscend! | IT Services and IT Consulting | ๐บ๐ธ Chicago | 311 | 2020 |
| 14 | [STL Business & Technology Solutions](https://www.tamtam.ai/c/stl-business-and-technology-solutions) (stl-bts.com)
Delivering innovative IT services, reliable staffing solutions, state-of-the-art Cloud & Data Center services, Managed IT, Cybersecurity, and diverse staffing options | IT Services and IT Consulting | ๐บ๐ธ Bloomington | 249 | 1991 |
| 15 | [Maven Wave, an Eviden Company](https://www.tamtam.ai/c/maven-wave-an-eviden-company) (atos.net)
Leading next-generation technology company specializing in data-driven, trusted, and sustainable digital transformation with expertise in AI, cloud, security, and advanced computing. | IT Services and IT Consulting | ๐บ๐ธ Chicago | 241 | |
| 16 | [Hostway](https://www.tamtam.ai/c/hostway) (hostway.com)
The company supports innovators and entrepreneurs in achieving online success, aiming to improve the web environment collaboratively | Technology, Information and Internet | ๐บ๐ธ Chicago | 202 | 1998 |
| 17 | [Paragon Micro](https://www.tamtam.ai/c/paragon-micro) (paragonmicro.com)
A technology provider known for impressive growth, industry accolades, and solving problems creatively while integrating people, technology, and business needs | IT Services and IT Consulting | ๐บ๐ธ Buffalo Grove | 200 | 2006 |
| 18 | [DSN Group](https://www.tamtam.ai/c/dsn-group) (dsngroup.net)
DSN Group offers cost-effective IT solutions for managing infrastructure, including servers, network security, storage, and data management, with a focus on leveraging current assets | IT Services and IT Consulting | ๐บ๐ธ Hoffman Estates | 196 | 1984 |
| 19 | [MNJ Technologies](https://www.tamtam.ai/c/mnj-technologies) (mnjtech.com)
IT solution provider helping midmarket-to-enterprise customers increase productivity and reduce costs through personalized technology solutions, services, and digital transformation | IT Services and IT Consulting | ๐บ๐ธ Buffalo Grove | 174 | 2002 |
| 20 | [Lyra Technology Group](https://www.tamtam.ai/c/lyra-technology-group) (lyratechgroup.com)
Leading IT services provider for small and medium-sized organizations, serving over 10,000 clients globally with a focus on retaining original culture and brand | IT Services and IT Consulting | ๐บ๐ธ Chicago | 83 | 2017 |
| 21 | [NPO USA Inc](https://www.tamtam.ai/c/npo-usa-inc) (npousa.com)
A leading IT service provider specializing in digital transformation, cloud solutions, DevOps, cybersecurity, compliance, and IT management as part of the Ricoh Group | IT Services and IT Consulting | ๐บ๐ธ Chicago | 38 | 2015 |
| 22 | [AIS, Inc.](https://www.tamtam.ai/c/ais-inc) (aislabs.com)
Full-service IT Technology Firm specializing in Infrastructure, Virtualization, Consulting, Cloud Hosting, Security, and Managed Services for various sectors Complete solution for business technology needs | IT Services and IT Consulting | ๐บ๐ธ Oakbrook Terrace | 37 | 2002 |
| 23 | [Framework IT](https://www.tamtam.ai/c/framework-it) (frameworkit.com)
Managed IT services provider specializing in support, strategy, and security to create agile IT environments, empower growth, and lead businesses in technology | IT Services and IT Consulting | ๐บ๐ธ Chicago | 35 | 2008 |
| 24 | [Peters & Associates (Acquired by Ascend Technologies)](https://www.tamtam.ai/c/peters-and-associates-acquired-by-ascend-technologies) (teamascend.com)
This company enables business growth through innovative IT solutions, secure systems, and optimized user productivity, helping businesses expand and innovate | IT Services and IT Consulting | ๐บ๐ธ Oakbrook Terrace | 34 | 1981 |
| 25 | [CITYTECH, Inc. (Now part of ICF Olson)](https://www.tamtam.ai/c/citytech-inc-now-part-of-icf-olson) (icfolson.com)
A global technology and marketing enablement company specializing in digital strategy, enterprise app development, web management, mobile solutions, and cloud services for business success | IT Services and IT Consulting | ๐บ๐ธ Chicago | 18 | 2003 |
| 26 | [Nine Boards](https://www.tamtam.ai/c/nine-boards) (nineboards.com)
A global consultancy specializing in SAP, Microsoft, and Looker services, offering consulting, implementation, hosting, managed services, and support for digital transformation | IT Services and IT Consulting | ๐บ๐ธ Warrenville | 16 | 2015 |
| 27 | [SDS Technology](https://www.tamtam.ai/c/sds-technology) (sdstech.net)
A technology company offering expertise, services, and innovative solutions since 1984 Partnered with top vendors to provide cutting-edge technology upgrades and support | Computer and Network Security | ๐บ๐ธ Effingham | 10 | 1984 |
| 28 | [CMIT Solutions of North Lake County](https://www.tamtam.ai/c/cmit-solutions-of-north-lake-county) (cmitsolutions.com)
Professional IT support and technology services provider specializing in proactive maintenance, monitoring, and backups for businesses to ensure efficient, safe, and reliable IT environments | IT Services and IT Consulting | ๐บ๐ธ Lake Bluff | 9 | 1998 |
| 29 | [Prime TSR](https://www.tamtam.ai/c/prime-tsr) (onec1.com)
Technology modernization consultancy creating custom solutions for organizations to manage the past, navigate the present, and plan for the future in ever-evolving landscapes | IT Services and IT Consulting | ๐บ๐ธ Chicago | 6 | 2013 |
| 30 | [EBTS USA](https://www.tamtam.ai/c/ebts-usa) (ebtsusa.com)
Trusted IT managed services provider offering industry solutions, business process expertise, and application services to modernize and support agile, resilient businesses globally | IT Services and IT Consulting | ๐บ๐ธ Chicago | 5 | 2007 |
| 31 | [Digimite Technology](https://www.tamtam.ai/c/digimite-technology) (mydigimite.com)
A global managed services provider supporting medium to large businesses with IT infrastructure and strategy, ensuring world class customer value | IT Services and IT Consulting | ๐บ๐ธ Naperville | 4 | 2006 |
| 32 | [TriForma Tech](https://www.tamtam.ai/c/triforma-tech) (triforma.com)
Offering a range of IT services such as server maintenance, disaster recovery, cloud solutions, cyber security, and asset management to ensure business success | IT Services and IT Consulting | ๐บ๐ธ Chicago | 4 | 1996 |
| 33 | [Datastrive](https://www.tamtam.ai/c/datastrive) (datastrive.com)
Provider of comprehensive IT services including Managed IT Support, Cybersecurity, Cloud Solutions, aiming to streamline operations, enhance security, and drive growth | IT Services and IT Consulting | ๐บ๐ธ Chicago | 3 | 2003 |
| 34 | [Outsource IT Solutions Group, Inc.](https://www.tamtam.ai/c/outsource-it-solutions-group-inc) (osgusa.com)
A Naperville-based company offering outsourced IT services to businesses in the Chicago area, specializing in network information technology solutions | IT Services and IT Consulting | ๐บ๐ธ Naperville | 3 | |
| 35 | [Twinbee Servers](https://www.tamtam.ai/c/twinbee-servers) (twinbeeservers.com)
A hosting company since 2013, providing top-notch services and customer support In-house experts ensure safe, secure, and personalized hosting solutions | IT Services and IT Consulting | ๐บ๐ธ Chicago | 2 | 2013 |
## 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/managed-service-providers-illinois