The primary objective of an internal audit engagement supervisor is to uphold the quality of the internal audit actively. This involves ensuring that the audit procedures are performed effectively, the findings are accurate and reliable, and the audit meets the necessary professional standards. The supervisor oversees the audit team's work, provides guidance and support, and ensures that the engagement is conducted according to the internal audit plan and methodology. This role is crucial in maintaining the credibility and integrity of the audit function.

IIA Standard 2340: Engagement Supervision

IIA Practice Guide: Internal Auditing and Assurance