Case Study: Large U.S. Cabinet-Level Department achieves $900,000 annual savings and rapid threat detection with Splunk Enterprise (Splunk)

US Government Cabinet-Level Department Reduces Costs, Improves Security Posture with Splunk Platform

A large U.S. cabinet-level department (about 40 agencies, ~200,000 hosts and 130,000 users) was struggling with a legacy SIEM (HP ArcSight) that was slow, costly to maintain, hard to develop on, and relied on time-consuming manual log reviews—leaving gaps in security detection, compliance auditing, and incident investigations that often took hours.

The department migrated to Splunk Enterprise and Splunk Enterprise Security with support from a Splunk partner, building a single pane-of-glass and dashboards for rapid hunting and phishing response while retaining raw logs for audits. The change cut investigation time from hours to minutes, improved detection and remediation, boosted analyst productivity, reduced waste/fraud, and saved about $900,000 annually in maintenance.