Internal Autitor Requirement

Each organization has the authority to determine the competency requirements of its internal auditors.
Normally, organizations consider two topics:

• Knowledge of the standard, in this case ISO 14001:2015
• Knowledge of good auditing practices

An internal auditor does not need to be certified, just need to comply with the organization’s competency requirements. Just being familiar with ISO 14001 is not enough.

You can find more information below:

• What competences should an ISO 14001 internal auditor have? - https://advisera.com/14001academy/blog/2016/07/04/what-competences-should-an-iso-14001-internal-auditor-have/
• Book – The ISO 14001:2015 Companion - https://advisera.com/books/the-iso-14001-2015-companion/