American Express employee is being investigated for accessing card holder information and potentially using it to open accounts at other financial institutions. American Express is offering free credit monitoring through Experian Identity Works. The employee is no longer employed by AMEX and is currently under criminal investigation. The information that was accessed for affected cardholders includes the full name, physical and/or billing address, Social Security numbers, birth dates, and the credit card number. The person in question is currently no longer an employee of American Express.
Source: https://www.bleepingcomputer.com/news/security/american-express-customer-info-accessed-by-employee-for-possible-fraud/