Requirements to become consultant

Do I need to be certified, in some way, to help them design and implement a Quality management policy that will eventually be audited by an ISO auditor?”

Answer:
No, you do not need to be certified in any way. As long as you have project management skills, as long as you have communication skills and as long as you know the management system standard.

The following material may help you with that challenge:
- ISO 9001 – Checklist of ISO 9001 implementation & certification steps - https://advisera.com/9001academy/knowledgebase/checklist-of-iso-9001-implementation-certification-steps/
- ISO 9001 Implementation diagram - https://info.advisera.com/9001academy/free-download/iso-9001-implementation-diagram
- Free ISO 9001:2015 Gap Analysis Tool - https://advisera.com/9001academy/iso-9001-gap-analysis-tool/
- Free course - ISO 9001:2015 Found ations Course - https://advisera.com/training/iso-9001-foundations-course/
- Free course - ISO 9001:2015 Lead Implementer Course - https://advisera.com/training/iso-9001-lead-implementer-course/
- book - Discover ISO 9001:2015 Through Practical Examples - https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/