An auditor is a trained person who performs an audit and checks how the management system(s) in companies and organizations comply with the requirements of the relevant standards by questioning, observing and listening.
A general distinction is made between an internal and an external auditor.
The auditor examines and analyzes the organizational structures and work processes (according to the specification documents), checks and ensures compliance with external and internal company regulations, guidelines and instructions and / or translates the audit results into practical recommendations.