Definian Email Format

IT Services and IT ConsultingIllinois, United States201-500 Employees

Definian is an IT services and IT consulting firm based in Chicago, Illinois. The company traces its origins to 1985 when it was founded as Premier International and rebranded in 2025. It draws on four decades of data expertise to help organizations unlock the full value of their data, supporting them through data strategy, modernization, advanced analytics, and AI as part of their digital evolution. 

It serves global enterprises, technology providers, and system integrators, helping these clients achieve measurable outcomes and maintain a data-driven edge. In February 2026, Definian announced leadership changes involving the addition of a senior vice president of insights and AI joining as a co-owner and the appointment of an Insights Practice Lead, signaling ongoing organizational expansion. The firm operates from Chicago and maintains a mid-sized footprint within the IT services and consulting sector.

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