Framework Guide

How to find an Internal Auditor

Jessica Doering
November 17, 2025

ISO 27001 certification is an important milestone for any organization that wants to demonstrate its commitment to information security management. A crucial element of this journey is finding the right internal auditor to guide and assess your organization's compliance with ISO 27001 standards. In this blog, we look at the key considerations that will help you find the most suitable internal auditor for your ISO 27001 process.

Before you start looking for an internal auditor, you should also be fully aware of the requirements of the ISO 27001 standard. Familiarize yourself with the clauses, controls and implementation guidelines of the standard to ensure you can find an auditor with the required expertise. 

Consider these points when looking for an internal auditor

Define Your Organization's Needs

Every organization is unique, and information security management system (ISMS) requirements will vary accordingly. Clearly define your organization's needs, including the scope of the ISMS, the size of your organization and any industry-specific regulations that may apply. These factors will help you find an internal auditor with the appropriate experience.

Qualifications and certifications of the auditor

Look for internal auditors who have relevant qualifications and certifications. The most important certifications for ISO 27001 auditors include Certified Information Systems Auditor (CISA), Certified Information Security Manager (CISM) and ISO 27001 Lead Auditor. These certifications demonstrate a commitment to professional excellence in the field of information security management.

Industry Experience

An internal auditor with experience in your specific industry brings valuable insight and context to the audit process. They will better understand the specific compliance challenges and requirements in your industry, increasing the effectiveness of the ISO 27001 audit.

Assess Communication and Interpersonal Skills

Clear communication is critical during the audit process. Look for an internal auditor who can clearly articulate their findings, recommendations and corrective actions. Good interpersonal skills are also important as the auditor will need to work with various stakeholders in your organization.

Check References and Past Performance

You can also request references from potential internal auditors and inquire about their previous performance on similar projects. Interacting with organizations that have undergone ISO 27001 certification with the help of the auditor could give you an insight into their professionalism, thoroughness and ability to deliver results.

Consider Regulatory Compliance

If your organization operates in a highly regulated industry, you should ensure that the internal auditor is familiar with the specific legal requirements and can meet them. Compliance with industry standards in addition to ISO 27001 can be critical to your organization's overall risk management.

Selecting the right internal auditor is vital for ISO 27001 certification.

By considering the above factors and conducting a thorough evaluation, you can find an auditor who not only meets the requirements of the standard, but is also aligned with the specific needs and goals of your organization... and there should be some interpersonal match ;). 

A well-chosen internal auditor will not only facilitate the certification process, but will also contribute to the continuous improvement of your information security management system.

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