Cardinal Services, Inc, Cardinal Employer Organization, and Preferred Employer Solutions, collectively (“Cardinal”) data breach

Clerk's notes

Cardinal Services, Inc., along with Cardinal Employer Organization and Preferred Employer Solutions (collectively referred to as Cardinal), functions as a Professional Employer Organization (PEO). PEOs typically handle sensitive employee data for client companies, including records related to payroll, taxes, and benefits administration. In 2026, Cardinal officially disclosed a data security incident to the Maine Attorney General, confirming that their systems were accessed by unauthorized parties.

The report to the Maine Attorney General was filed on May 20, 2026, and the matter is currently under investigation. If you received a formal data breach notification letter from Cardinal, it signifies that your personal information was likely stored within their network at the time of this security event.

While the specific categories of data involved in this incident have not been detailed, the nature of Cardinal's business suggests that the information involved could be sensitive. The notification you received indicates that your data was part of the breach.

Individuals who received a notification letter should carefully review its contents for any specific recommendations from Cardinal. It is generally advisable to remain vigilant for any unusual activity in your accounts and to consider implementing robust password practices for online services. Pay close attention to any offers of credit monitoring services provided by Cardinal.

Understanding the implications of a data security incident can be complex. If you received a data breach notification from Cardinal and have questions about its impact on your personal information, you may wish to discuss your situation with legal counsel.

If a notification letter about this breach reached you, see every Maine data breach on file or browse all cases.