How Many People Work at Illumio? Headcount and Employee Trends

Illumio is a cybersecurity and software company known for its Zero Trust Segmentation offerings. The organization employs about 630 people according to the dataset. The figures indicate 88 hires and 30 departures, resulting in net workforce expansion. Headcount is balanced across customer-facing and technical functions, with notable concentration in Sales and Support and Engineering.

Illumio’s largest teams are Sales and Support (231 employees, about 36.7%) and Engineering (181 employees, about 28.7%), together accounting for roughly 65% of the workforce. Marketing and Product totals 70 employees (about 11.1%), while Business Management (35), Information Technology (33), and Finance and Administration (32) each make up around 5% of headcount. Human Resources has 21 employees, Operations has 15, and Program and Project Management has 5, with 7 categorized as Other. The data shows a product- and customer-focused mix with substantial supporting functions across IT, finance, HR, and operations.

Employee distribution spans multiple hubs with the largest concentration in San Francisco, CA (227 employees, about 36%). Additional U.S. hubs include Denver (13), New York (12), Boston (8), Austin (7), and Chicago (7). International presence includes Sydney (13), Singapore (10), and London (9). A significant portion of the workforce is grouped under Other (324 employees, about 51%), suggesting a distributed or multi-site footprint beyond the listed locations.