ISO 9001:2015 does not specifically require organizations to use a consultant for QMS implementation or to acquire an auditor's certificate. ISO 9001 emphasizes that organizations are responsible for developing, implementing, and maintaining their QMS
The decision to engage a consultant or acquire auditor certification is typically at the discretion of the organization. Many organizations choose to work with consultants for various reasons, including expertise, guidance, and resources. However, this is a business decision and not a mandatory requirement outlined in the ISO 9001 standard.
It's important to note that while the ISO 9001 standard doesn't mandate these activities, organizations should ensure that their chosen consultants or auditors are qualified and competent to provide the necessary expertise and meet the standard's requirements. Additionally, some industries or sectors may have specific regulations or customer requirements that influence the use of consultants or auditors, but this is not a requirement dictated by the ISO 9001 standard itself.