Case Study: Cordaan prevents email breaches and improves employee security behavior with Proofpoint

How Tessian Is Preventing Breaches and Influencing Safer Behavior in Healthcare

Cordaan, one of Amsterdam’s largest healthcare providers serving 20,000 people across 120 locations with 6,000 employees and 2,500 volunteers, was increasingly targeted by inbound email threats—spear phishing, business email compromise and frequent misdirected messages. Empathetic, service‑oriented staff (exacerbated by pandemic stress) and reactive, rule‑based email tools left the organization with limited visibility into data‑loss incidents and gaps in GDPR compliance.

Cordaan deployed Tessian Defender, Guardian and Enforcer in a 6,300‑user rollout. Tessian’s machine‑learning Human Layer Security analyzes email behavior in milliseconds and issues in‑the‑moment warnings for anomalous recipients and risky outbound activity, giving security teams real‑time visibility. The solution prevented spear‑phishing and misdirected emails, reduced data‑exfiltration risk, influenced safer employee behavior, and strengthened Cordaan’s risk‑based business case by helping avoid potential fines.

Cordaan

Cac De Bie

Chief Information Officer