Case Study: City and County of Denver achieves rapid MFA rollout to 18,000 users and stronger security with Duo Security

City and County of Denver - Customer Case Study

The City & County of Denver, a municipal government with 30+ departments serving roughly 750,000 residents, faced MFA sprawl across a hybrid IT environment as it moved sensitive systems to the cloud. Multiple legacy solutions created administrative overhead, inconsistent user experiences, and exposure to increased phishing risk, while the organization needed to meet strict compliance requirements (PCI‑DSS, CJIS).

The InfoSec team selected Duo for its broad integrations and simple user experience—offering a mobile app, FIDO keys and offline YubiKey options for restricted environments—and rolled it out in phases with self‑enrollment and targeted communications. The deployment reached more than 18,000 users in under three months with fewer than 100 help‑desk tickets, strengthened compliance and reduced breach risk while supporting a shift toward a zero‑trust security posture.

City and County of Denver

Paul Kresser

Chief Data Officer