Event Citadel (formerly CompuSystems) Information
Summary
Event Citadel, formerly CompuSystems, is an independent event management company headquartered in Lisle, Illinois, serving the Chicago Metropolitan Area since its founding in 1976.
With a workforce of 100–200 employees and annual revenue between $10 million and $50 million, the firm specializes in event registration, lead retrieval, and analytics solutions under SIC code 8741. Its services support organizers in creating seamless attendee experiences from pre‑event planning through post‑event data analysis.
Key leaders include Charmaine Reyes as Registration Project Manager / Event Services Manager, Francis Bugyei heading Onsite Operations, Vijay Sekar consulting for the DC area, Marissa Iles overseeing event services, and Rickey Robinson managing lead retrieval and registration. Together they drive Event Citadel’s commitment to precision, reliability, and actionable insight for events of all sizes.
| Website | compusystems.com |
| Social Links |    |
| Phone Number | 708-344-9070 |
| Industries | |
| Headquarters Address | 2300 Cabot Dr, Lisle, Illinois, 60532 US |
| Company Size | 100-200 employees |
| Specialities & Services | Event Registration, Lead Retrieval, Analytics |
| Technologies | jQuery, HubSpot CMS, PHP, WordPress, Flask, Spring, Magento, Chakra UI, Laravel, Bootstrap |
| SIC Code | 8741 |
| NAICS Code | 236115 New Single-Family Housing Construction (except For-Sale Builders), 236116 New Multifamily Housing Construction (except For-Sale Builders), 236118 Residential Remodelers, 236210 Industrial Building Construction, 236220 Commercial and Institutional Building Construction, 237110 Water and Sewer Line and Related Structures Construction, 237120 Oil and Gas Pipeline and Related Structures Construction, 237130 Power and Communication Line and Related Structures Construction, 237310 Highway, Street, and Bridge Construction, 237990 Other Heavy and Civil Engineering Construction, 561110 Office Administrative Services |
| DMA Code | Chicago Metropolitan Area |
| Founded | 1976 |
| Estimated Annual Revenue | $10M - 50M |
| Operating Status | Independent Company |
| Updated: | 2026-10-08 |
Competitors
Name | Founded | Type | Employees |
|---|---|---|---|
| 2011 | Privately Held | 1.0K - 5.0K | |
| 2008 | Privately Held | 250 - 500 | |
| 2011 | Privately Held | 250 - 500 | |
| 2001 | Privately Held | 25 - 100 |
Estimated Website Traffic
The chart shows a growth in traffic to the compusystems.com website. In September, traffic increased to 412, compared to 403 in the previous month. The highest traffic in 2026 was recorded in February, reaching 2216 visits.
Workforce Turnover
Corporate Tenure Analytics
Workforce Experience Insights
2% have been with the company for less than 1 year3% have been with the company for 1 to 2 years6% have been with the company for 3 to 4 years6% have been with the company for 5 to 7 years5% have been with the company for 8 to 10 years78% have been with the company for more than 11 years
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