ISO 45001 requirement for Internal Audit

The ISO 45001:2018 standard does not dictate that you need to be certified in ISO 45001 to conduct internal audits, however the standard does state that you need to identify the competencies for internal auditors, as with all other jobs in yoru organization. These competencies should certainly include knowledge of the ISO 45001 standard and how it applies to the organization, but certifiction to the standard is not a requirement.

To find out more about the competencies of auditors for ISO 45001, see the article: What competences should an ISO 45001 internal auditor have?, https://advisera.com/45001academy/blog/2019/10/31/iso-45001-internal-auditor-what-competences-are-needed/