Key Universal Principles of Segregation of Duties

The most common criteria to be considered for segregation of duties of critical activities are:

• the person who elaborates something does not approve it
• the person how performs a task does not review it

Considering that, for example, the internal auditor/security tester should not be the same person as the service manager. The service manager defines and handles changes/incidents, while internal auditor/security tester verifies if these are effective. So, you should verify exactly which activities will be performed by each role to identify potential conflicts of interest.

For further information, see:

• Segregation of duties in your ISMS according to ISO 27001 A.6.1.2 https://advisera.com/27001academy/blog/2016/11/21/segregation-of-duties-in-your-isms-according-to-iso-27001-a-6-1-2/

These materials will also help you regarding segregation of duties:

• ISO 27001 Annex A Controls in Plain English https://advisera.com/books/iso-27001-annex-controls-plain-english/
• ISO 27001 Foundations Course https://advisera.com/training/iso-27001-foundations-course/