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How to Become an ISO 27001 Lead Auditor

  • iso 27001 lead auditor
  • Published by: André Hammer on Feb 07, 2024

Are you interested in a career in information security? If so, becoming an ISO 27001 lead auditor could be a great step forward. In this role, you would assess and ensure an organization's information security management system meets the ISO 27001 standard. This article will guide you through the process of becoming a certified lead auditor, including the training and experience needed to excel in this role.

Understanding ISO/IEC 27001

Definition and Scope

ISO/IEC 27001 is the international standard for managing information security. It outlines a risk-based approach to securing sensitive information, including digital assets, customer data, and financial information. Understanding ISO/IEC 27001 is important in information security as it provides a framework for organizations to establish, implement, maintain, and continually improve their information security management system.

This standard helps identify and manage risks like cyber attacks, data breaches, and unauthorized access to information. For an ISO 27001 Lead Auditor, a clear understanding of the standard's definition and scope is essential for evaluating an organization's compliance. They are responsible for assessing the effectiveness of information security controls and ensuring they meet the requirements of ISO/IEC 27001. This includes evaluating policies, procedures, and documentation, as well as conducting on-site audits to verify compliance.

Importance of Information Security

Information security is very important for any organisation. It helps protect sensitive data, financial information, and intellectual property from potential cyber-attacks and breaches. Inadequate information security measures can lead to serious consequences, such as financial loss, damage to the organization's reputation, and legal implications.

Additionally, having strong information security in place can contribute to the overall success and sustainability of a business. This is achieved by building trust with customers and partners, complying with regulatory requirements, and mitigating the risk of data breaches.

For instance, implementing encryption techniques, access controls, and regular security audits are practical ways for organisations to enhance their information security and safeguard their valuable assets against external threats.

Prerequisites for Becoming a Lead Auditor

Educational Background

Applicants for the ISO 27001 Lead Auditor position are usually expected to have a Bachelor's degree in a relevant field, like information technology or computer science. Having a strong educational background in these areas can help in understanding technical aspects of information security, risk management, and audit processes.

In addition, advanced degrees or certifications related to information security, such as Certified Information Systems Auditor (CISA) or Certified Information Systems Security Professional (CISSP), can further strengthen the qualifications of a potential Lead Auditor. A solid educational foundation not only equips individuals with the knowledge and skills needed for the role, but also enhances their credibility and expertise in the eyes of employers and clients.

Knowledge gained through formal education enables auditors to effectively interpret and apply ISO 27001 standards, identify potential risks, and make informed decisions to enhance an organization's information security management system.

Relevant Work Experience

The ISO 27001 Lead Auditor should have a proven track record of performing information security audits or assessments within relevant industries. They need experience in reviewing controls, evaluating risks, and identifying non-conformities.

Effective communication skills are essential in presenting findings and recommendations to senior management. The candidate should also be adept at writing audit reports that clearly outline the assessment process, results, and any corrective actions required.

Furthermore, the ability to lead and guide audit teams, as well as liaise with external certification bodies, is crucial in this role. An understanding of the ISO 27001 standard and its requirements, as well as knowledge of applicable laws and regulations, is also expected.

Steps to Become an ISO 27001 Lead Auditor

Acquire Foundational Knowledge

To become an ISO 27001 Lead Auditor, it's important to have foundational knowledge. This includes understanding information security management systems, risk management principles, and audit processes.

You can gain this knowledge through formal training courses, self-study programs, and practical experience in information security and auditing. This knowledge is essential for effective planning, execution, and reporting on information security management system audits.

Having this foundational knowledge also allows individuals to identify and assess information security risks within an organization and ensure compliance with ISO 27001 standards. By acquiring this knowledge, individuals can contribute to the overall effectiveness of an organization's information security management system and enhance their career opportunities in the field of information security auditing.

Enrol in Lead Auditor Training

Before enrolling in an ISO 27001 lead auditor training programme, it's important to have knowledge and experience in information security or information technology. Students may need to show their experience through specific certification.

The ISO/IEC 27001 certification is now a requirement for information security management due to technological advancements. It's an internationally recognized standard for information security management professionals.

When choosing an ISO/IEC 27001 lead auditor course, it's essential to be cautious and research accredited training providers. The right provider should be accredited and meet industry standards.

Consider whether the training provider offers practical or theoretical experience and the associated costs. Also, ensure that the content delivered meets the standard requirements for teaching the skills to become a competent ISO 27001 lead auditor.

Pass the Lead Auditor Examination

To pass the Lead Auditor Examination for ISO 27001, individuals need to understand the standard's requirements. They should also demonstrate practical knowledge of information security management systems.

It's advisable to undergo formal training from an accredited certification body, such as an ISO 27001 Lead Auditor training course. Prerequisites for becoming a successful ISO 27001 Lead Auditor include a background in information security and experience in conducting audits.

To ensure choosing the right training provider, individuals can research the accreditation and reputation of the training organization. They should also check the course content to ensure it covers necessary topics and provides practical examples.

Gain Practical Audit Experience

Practical audit experience in ISO 27001 can be gained through a variety of steps. These include participating in internal and external audits, conducting risk assessments, and implementing information security management systems.

By actively engaging in these activities, individuals can familiarise themselves with the audit process and develop a deeper understanding of ISO 27001 standards. The hands-on experience gained from these activities can significantly enhance an individual's ability to become a successful Lead Auditor by providing them with practical insights into the complexities of information security management.

However, obtaining practical audit experience may also pose potential challenges. These challenges include the need to navigate complex organisational structures and effectively communicate audit findings to stakeholders.

Overcoming these challenges requires individuals to demonstrate strong interpersonal skills and a solid understanding of ISO 27001 principles. This ensures that they can effectively apply their practical experience in real-world audit scenarios.

Apply for Certification

To become an ISO 27001 lead auditor, you must complete foundational knowledge and lead auditor training for ISO 27001. This involves practical audit experience in information security management systems.

The certification process includes written and practical exams to test your understanding of ISO 27001 requirements and your ability to apply this knowledge in auditing scenarios. Candidates must also demonstrate skills in planning, conducting, reporting, and follow-up of an ISMS audit according to ISO 19011 and ISO 27007.

This may involve developing an audit plan, conducting on-site audits, evaluating findings, and reporting results clearly. Applicants should provide evidence of these experiences through references, case studies, or written reports during the certification application process.

Choosing the Right Training Provider for ISO 27001 Lead Auditor

Accreditation of the Training Provider

When pursuing ISO 27001 Lead Auditor training, it's important to consider the accreditation of the training provider. Participants should check if the provider is accredited by a recognised body for ISO 27001 Lead Auditor training. They should also look into the specific accreditations or certifications the provider holds. Accreditation ensures the quality and credibility of the training courses, demonstrating that the provider meets necessary standards.

Choosing an accredited provider ensures participants receive high-quality, industry-recognised training aligned with ISO 27001 Lead Auditor standards and best practices.

Training Course Content

The training course for ISO/IEC 27001 Lead Auditor certification should include modules that cover the standard's requirements, auditing principles, methodologies, and best practices. It should also explain the audit process, such as planning, conducting, reporting, and follow-up, following ISO 19011 guidelines. The training should equip participants with skills to evaluate an organization's information security management system against ISO/IEC 27001 requirements.

The training content can prepare individuals for the role of an ISO 27001 Lead Auditor by providing practical examples and case studies for different organizational contexts. Through interactive discussions and workshops, participants can learn to identify, analyze, and evaluate information security risks and controls. They can also learn about effective communication with stakeholders and reporting on audit findings to ensure the integrity and impartiality of the audit process.

The course should cover various aspects of information security, including risk assessment, threat identification, vulnerability management, incident response, and compliance requirements. Addressing current global trends and emerging technologies is essential to understand ISO/IEC 27001 and its relevance to different business environments.

Trainer Expertise

A trainer with expertise in ISO 27001 needs the ISO 27001 Lead Auditor certification and experience in conducting ISO 27001 audits. They should also have practical knowledge of the standard's requirements and implementation. This helps them guide professionals in applying the principles of ISO 27001 to their organizations. Trainers must understand compliance, risk management, and information security practices to provide practical examples in their training.

Training providers with experienced ISO 27001 auditors as trainers add value to their courses. Practical audit experience allows trainers to bring real-life scenarios into the training, helping participants grasp ISO 27001 complexities more effectively. This ensures that professionals gain insights and understanding that goes beyond theory, enabling better application of ISO 27001 principles in their organizations.

Audit Process and Responsibilities of an ISO 27001 Lead Auditor

Planning the Audit

When planning an audit for ISO/IEC 27001, the important steps involve:

Determining the scope of the audit,

Identifying the audit criteria,

Establishing the audit objectives.

It's important to consider the resources required, including the necessary skills and knowledge to conduct the audit effectively. The responsibilities of an ISO 27001 lead auditor include:

Coordinating and managing the audit team,

Ensuring the audit is conducted according to the established audit plan,

Verifying the effectiveness of the ISMS.

When choosing a training provider for ISO 27001 lead auditor certification, important considerations include:

The provider’s accreditation,

The reputation and experience of the trainers,

The course content,

The support and resources available to candidates.

These factors are important to ensure that the training received is of high quality and meets the necessary requirements for certification.

Conducting the Audit

When preparing for an ISO 27001 audit, the lead auditor needs to thoroughly plan. This involves reviewing the organization's ISMS documentation, defining the audit's scope and objectives, and establishing audit criteria and methods.

During the audit, the lead auditor is responsible for conducting on-site interviews and observations, reviewing procedures and records, and evaluating the ISMS's effectiveness in meeting information security objectives.

For documenting and reporting audit findings, the lead auditor should accurately record relevant information. This includes nonconformities and improvement opportunities. They also need to prepare a detailed audit report presenting findings, conclusions, and recommendations to the management team and stakeholders. This helps the organization understand its ISMS's effectiveness and areas for improvement.

Reporting Audit Findings

Reporting audit findings in ISO 27001 involves documenting nonconformities and areas of improvement. The documentation should be clear and concise, with evidence-based conclusions and recommendations.

A lead auditor should use a systematic approach to effectively communicate and document audit findings. This ensures that the information is transparent, accurate, and relevant to the organization's information security management system.

When presenting audit findings to management and stakeholders, it is best to tailor the communication to the audience. Offer practical solutions and be open to feedback and discussions. It's also important to use language that is understandable to all stakeholders, avoiding technical jargon. This helps convey the significance of the findings and their potential impact on the organization's information security management system.

Follow-up and Audit Closure

During the follow-up and audit closure process in ISO 27001 lead auditor, all identified non-conformities and corrective actions are appropriately addressed and closed.

For example, if during the audit, it is found that an organization is not performing regular risk assessments as per the ISO/IEC 27001 standard, the follow-up process ensures that this issue is addressed and corrective actions are taken to comply with the standard.

Additionally, involvement of all relevant stakeholders is crucial to ensure accountability and compliance with ISO/IEC 27001 standards during the follow-up and audit closure activities.

The participation of stakeholders, such as top management, information security personnel, and other relevant departments, helps in addressing any non-conformities and ensures that corrective actions are implemented effectively and in a timely manner.

The effectiveness of the follow-up and audit closure process is measured and evaluated through various methods such as monitoring the implementation of corrective actions, reviewing non-conformities, and conducting internal audits.

This continuous evaluation ensures that the information security management system is continuously improving and aligned with the ISO/IEC 27001 standard.

Maintaining ISO 27001 Lead Auditor Certification

Continual Professional Development

ISO 27001 Lead Auditors can maintain their certification through Continual Professional Development. This involves staying updated on the latest information security management trends, attending relevant workshops and seminars, and actively participating in industry-related webinars.

It is important for ISO 27001 Lead Auditors to regularly recertify to maintain their professional expertise. Continual Professional Development ensures that individuals stay current on the best practices and new developments in information security management, making them more effective at their roles.

Regular recertification is essential for ISO 27001 Lead Auditors to demonstrate their commitment to upholding the highest professional standards and to showcase their ongoing dedication to improving their knowledge and skill set within the field.

Regular Recertification

To stay certified as an ISO 27001 Lead Auditor, individuals need to:

  • Undergo an annual review of their professional knowledge and competence in information security management systems.
  • Complete a certain number of continuing professional education (CPE) hours.
  • Stay up to date with the latest industry standards, best practices, and technologies.
  • Actively participate in relevant industry events, seminars, and workshops to continuously enhance their skills and knowledge.

Auditors must recertify annually to demonstrate their commitment to professional development, keep current with evolving industry standards, and validate their expertise in performing information security audits.

ISO 27001 Lead Auditor Code of Ethics


ISO 27001 Lead auditors demonstrate professionalism by maintaining impartiality throughout the audit process. They approach their work with integrity and independence, adhering to the highest ethical standards.

They ensure effective communication with the auditee and avoid conflicts of interest, fostering trust and respect.

Professionalism during audits includes being well-prepared, respecting confidential information, and providing constructive feedback supported by evidence.

This involves conducting themselves in a polite and respectful manner, maintaining confidentiality regarding sensitive information, and upholding standards to contribute to the overall effectiveness and credibility of the audit process.


Adhering to ISO/IEC 27001 standards is important for lead auditors, especially concerning confidentiality. To ensure confidentiality, the lead auditor should use encryption techniques when transferring sensitive information and maintain access controls at all times.

In the audit process, measures such as non-disclosure agreements, limited document access, and secure storage of confidential information are important. These precautions help prevent unauthorized access to sensitive data.


An ISO 27001 Lead Auditor can maintain impartiality during the audit process in several ways.

They should avoid conflicts of interest and stay independent from parties that may compromise their neutrality.

The focus should be on objective evidence to determine compliance with the standard.

Adherence to auditing procedures and making decisions based on evidence, rather than personal or professional relationships, is crucial.

Measures can be taken to ensure impartiality in reporting audit findings.

This includes accurately documenting all evidence and observations, providing objective and factual conclusions, and avoiding any influence that may compromise the integrity of the audit process.

Impartiality is important for an ISO 27001 Lead Auditor because it ensures the credibility and integrity of the audit process.

It builds trust with the auditee and guarantees that the audit findings accurately reflect the organization's compliance with the standard.

By maintaining impartiality, the ISO 27001 Lead Auditor upholds the principles of fairness and objectivity, which are essential in providing an accurate and reliable audit outcome.

Wrapping up

To become an ISO 27001 Lead Auditor, you need to understand information security management systems and go through formal training to learn auditing skills. It's also important to gain practical experience in auditing and show that you can conduct audits according to ISO 27001 standards. Getting certified as an ISO 27001 Lead Auditor is crucial for proving your abilities and credibility in this role.

Readynez offers a 4-day ISO 27001 Lead Auditor Course and Certification Program, providing you with all the learning and support you need to successfully prepare for the exam and certification. The ISO 27001 Lead Auditor course, and all our other ISO courses, are also included in our unique Unlimited Security Training offer, where you can attend the ISO 27001 Lead Auditor and 60+ other Security courses for just €249 per month, the most flexible and affordable way to get your Security Certifications.

Please reach out to us with any questions or if you would like a chat about your opportunity with the ISO 27001 Lead Auditor certification and how you best achieve it. 


What are the basic requirements to become an ISO 27001 Lead Auditor?

The basic requirements to become an ISO 27001 Lead Auditor include completing a formal training course accredited by a recognized certification body, having relevant work experience in information security management, and passing the ISO 27001 Lead Auditor certification exam.

What is the process for obtaining ISO 27001 Lead Auditor certification?

To obtain ISO 27001 Lead Auditor certification, one must complete a formal training course, pass the certification exam, and demonstrate experience in conducting ISMS audits. For example, you may enroll in a certified training program like the one offered by ISACA to prepare for the exam.

What are the key responsibilities of an ISO 27001 Lead Auditor?

The key responsibilities of an ISO 27001 Lead Auditor include planning and conducting audits, ensuring compliance with ISO 27001 standards, and preparing audit reports. They also oversee corrective actions and provide recommendations for improvements.

For example, an auditor might lead an audit team to assess an organization's information security management system (ISMS) and provide guidance on addressing non-conformities.

What are the common challenges faced by ISO 27001 Lead Auditors?

Common challenges faced by ISO 27001 Lead Auditors include stakeholder resistance, resource constraints, and maintaining objectivity. For example, convincing senior management to allocate resources for the audit process and ensuring that personal biases do not influence audit findings.

What are the benefits of becoming an ISO 27001 Lead Auditor?

Becoming an ISO 27001 Lead Auditor allows you to lead and conduct audits to ensure compliance with information security standards. This certification can lead to career advancement and opportunities for higher pay, as well as increased credibility and recognition in the industry.

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