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We figured out the best professional companies to work for in Illinois using data on salaries, company financial health, and employee diversity. You can also search for the best professional companies to work for in any other state or city.

Zippia score 4.6
Over the past 40 years, HAVI has grown in size, global reach, and breadth of services and customers served. One thing that will never change is their mission to “Deliver The Promise” to customers, employees and suppliers/partners.
Zippia score 4.6
Since 1982 Sentinel Technologies has been applying an extraordinary depth and breadth of technical solution expertise to design, sell, deploy and support our customer's business technology needs. Sentinel's unwavering commitment to thought leadership and customer satisfaction maximizes both the value of technology investments and impact to the business.
Zippia score 4.5
Ambitech is a full-service provider of engineering design services with deep expertise in Front-End Loading (FEL/FEED) work. For clients wanting the option of an integrated services delivery model, Ambitech's position as part of Zachry Group gives clie...
Zippia score 4.2
Allant is a marketing technology services provider that delivers end-to-end omni-channel marketing services. Allant's expertise and market knowledge enables the delivery through faster customer and 3rd party data integration, improved analytical insights, easy to understand data visualizations, and effective campaign management execution to enable personalized communication by marketers to acquire, retain and winback customers. Allant is a privately held company headquartered in the Chicago area. For more information, call 800.367.7311 or visit allantgroup.com.
Zippia score 4.0
Services, Not Elsewhere Classified.
| Rank | Company | Zippia score |
|---|---|---|
| 1 | HAVI | |
| 2 | Sentinel Technologies | |
| 3 | Ambitech Engineering | |
| 4 | Allant Group | |
| 5 | Nsa Media, Inc. |