Cardinal Services, Inc. (including Cardinal Employer Organization and Preferred Employer Solutions) disclosed a cybersecurity incident affecting systems containing personal information of individuals, including names, Social Security numbers, and dates of birth. Unauthorized access occurred on or around June 30, 2025, with further access discovered on August 8, 2025. The breach was confirmed via forensic investigation on May 12, 2026. Cardinal engaged external cybersecurity professionals, secured its environment, and offered complimentary credit monitoring and identity protection services to affected individuals.