Project Manager as internal auditor

Answer:

The project manager is involved in most of the activities related to the implementation of the ISO 27001, and since one requirement to be observed for an auditor is impartiality (an auditor cannot audit his own work), this person will not be able to perform the auditor role. The same applies to CISO, since he is responsible for reporting the ISM performance.

The best course of action would be to train an employee to perform internal auditor or hire an external auditor.

These articles will provide you further explanation about internal audit:
- How to prepare for an ISO 27001 internal audit https://advisera.com/27001academy/blog/2016/07/11/how-to-prepare-for-an-iso-27001-internal-audit/
- Qualifications for an ISO 27001 Internal Auditor https://advisera.com/27001academy/blog/2015/03/30/qualifications-for-an-iso-27001-internal-auditor/