What is the first action to take if a key employee leaves with access to sensitive information?

The first action to take when a key employee leaves with access to sensitive information is to revoke system access. This is crucial because it ensures that the departing individual can no longer access confidential or sensitive data, thereby protecting the organization from potential data breaches or unauthorized information disclosure. This step is pivotal since the immediate priority is to secure the organization's information assets and prevent any misuse by the exiting employee.

Revoke system access promptly minimizes any risks associated with lingering access rights, which could lead to data theft or loss. While conducting a security audit, notifying a compliance officer, or informing the IT department are all important steps in the overall process of managing the situation effectively, revoking access is the most urgent action. It directly addresses the potential threat posed by the employee's departure, ensuring that security is tightened immediately.