Top 70 Cybersecurity Consulting Services in Illinois
The Best of December 2025Looking for a top cybersecurity consultant in Illinois?
With their comprehensive approach to security, including vulnerability assessments, penetration testing, and security awareness training, cybersecurity consulting services help businesses identify and address security vulnerabilities before they can be exploited. By collaborating with cybersecurity consultants, businesses can maintain an edge over their competitors by keeping risks to finances and reputation at bay.
To assist you in your search for a partner, we’ve compiled this list of the top cybersecurity consulting firms in Illinois. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best Illinois Cybersecurity Consultants
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61Undisclosed250 - 999 employeesChicago, ILSEI, an IT strategy consulting company, was founded in 1992. The team focuses on IT strategy consulting and Business Consulting.Read More
Industries
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62Undisclosed50 - 249 employeesArlington Heights, ILTechTiera Corporation, a midsize IT strategy consulting company, is headquartered in Arlington Heights, Illinois. The team provides IT strategy consulting and BI & big data consulting & SI.Read More
Industries
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63$25,000+1,000 - 9,999 employeesChicago, ILRead More
ELEKS is a custom software development firm established in 1991. Their large team is in Tallinn, Estonia; L'viv, Ukraine; Berlin, Germany and Rzeszów, Poland. Their services include Custom Software Development, BI & big data consulting & SI, cloud consulting & SI, Cybersecurity, and more.
Clients
BNY Mellon DPD Acino DRAXIndustries
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