UA Sprinkler Fitters Local 669 JATC experienced a cybersecurity attack between May 17 and May 23, 2024, where an unauthorized actor copied files from their network. The organization became aware of suspicious activity on May 23, 2024. A forensic review concluded in January 2026, determining that sensitive information, including PII and employment data, was involved. The incident is contained, and the organization is offering credit monitoring to affected individuals.