ISO 27001 Auditor / Lead Auditor Certification
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Key Facts
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Who is it for?
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Why?
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How?
What is the ISO 27001 Auditor Certification?
The ISO 27001 Auditor certification officially certifies that an individual has mastered audit techniques and certification processes defined by the international standard ISO 27001.
It validates your ability to lead internal and external audits (independently or heading a team) to evaluate the effectiveness and compliance of an ISMS (Information Security Management System):
- Regulatory audit practice: Mastery of ISO 19011 guidelines and associated guides (ISO, IAF, EA) to conduct rigorous audits.
- Compliance analysis: Ability to analyse real-world situations, identify non-conformities, and evaluate the effectiveness of security measures against ISO 27001 requirements.
- Evidence collection and management: Capability to analyse audit evidence gathered in the field objectively and relevantly.
- Team leadership (Lead Auditor): Ability to coordinate an audit team, manage relations with auditees, and effectively conclude a certification audit.
Exam Syllabus
The exam uses multiple-choice questions (MCQs) to assess your technical and behavioural skills against precise evaluation criteria:
- Reference standards: Mastery of ISO 27001 and ISO 27002 standards (principles, vocabulary, organisation).
- Audit ecosystem: In-depth knowledge of audit and certification principles (ISO 19011, ISO/IEC 17021-1, and ISO/IEC 27006).
- Situational analysis: Ability to assess real-life scenarios, identify compliant or non-compliant situations, and analyse audit evidence.
- Information security risk management: Mastery of core principles and processes involved in cyber risk management.
- Audit engagement management: Capability to prepare, conduct, and conclude a security audit effectively and appropriately.
LSTI offers the certification exam based on the latest version in force: ISO/IEC 27001:2022.
Who is the ISO 27001 Auditor Certification for?
Target Audience
This certification is designed for all information security professionals seeking to master the certification process and audit delivery:
- Auditors wishing to conduct and lead certification audits on behalf of certification bodies.
- CISOs (Chief Information Security Officers) and Security Directors.
- Consultants and managers seeking to master the ISMS assessment process.
- Technical experts preparing for or assisting their organisation during an external audit.
- Compliance managers responsible for maintaining security requirements.
Prerequisites
- Knowledge of ISO 27001 requirements.
- Understanding of fundamental ISMS concepts.
Why take the certification exam with LSTI?
Established market leader in France
With over 20 years of experience, LSTI was the first body in France to offer personal skills certification for auditing ISO 27001 standards. This guarantees that your credentials will be valued by a benchmark industry player.
Official and international recognition (COFRAC Accreditation)
Personal certifications issued by LSTI strictly comply with ISO/IEC 17024 and are backed by COFRAC accreditation (Accreditation No. 4-0091, scope available on their website). This certification provides indisputable and officially recognised proof of your expertise, both nationally and internationally.
Career accelerator
Validating your skills is a key milestone and essential career leverage point for CISOs, project directors, and cybersecurity consultants. This credential demonstrates your ability to master and apply all requirements of the ISO 27001 standard.
Digital badge
Upon passing the exam, you will receive a digital certification badge. Secured by Blockchain technology, this badge guarantees clients, partners, and recruiters instant, tamper-proof verification of your credential's authenticity. You can add it directly to your CV or LinkedIn profile to highlight your ISO 27001 expertise and boost your employability.
How to prepare?
To guarantee complete impartiality in your personnel certification, LSTI acts strictly as an independent certification body and does not deliver training directly.
Depending on your situation, 2 preparation pathways are available for the exam:
- Register directly for the LSTI exam as a self-study candidate. This option is aimed primarily at professionals who already master the framework and possess relevant practical experience. Register directly for the exam.
- Complete a training course beforehand with an LSTI-approved training provider. This option is ideal for consolidating your theoretical skills and thoroughly addressing all framework requirements prior to taking the exam.
How does the exam work?
The ISO 27001 Auditor exam is taken online via our secure platform.
To guarantee certification integrity (in compliance with ISO/IEC 17024 requirements), remote proctoring is used. Candidates must have a computer equipped with a working webcam, microphone, and a stable internet connection. Candidate identity is verified prior to the start of the assessment.
Awarding certification status
Your certification depends solely on your exam result.
At LSTI, you can then enhance it through the award of an additional grade based on your level of experience. The issuing of this grade rests on the combination of two criteria: your exam achievement level and your practical experience.
Exam achievement levels:
In accordance with the LSTI certification regulations, the title awarded to you attests to a level based on your final score out of 100 points:
- Elementary: Score between 50 and 59.
- Intermediate: Score between 60 and 74.
- Advanced: Score of 75 or higher.
Experience levels:
To reflect your practical field experience, LSTI distinguishes between 3 status levels:
- Provisional Auditor: awarded when you cannot yet demonstrate auditing experience.
- Confirmed Auditor: awarded when you have at least 20 days of ISO 27001 auditing experience as an auditor.
- Lead Auditor: awarded when you have at least 20 days of ISO 27001 auditing experience, including at least 3 full audits in a lead auditor role, over the last 3 years.
Note: Lead Auditor status strictly requires an Advanced achievement level in the exam. If you achieve an Elementary or Intermediate level, Confirmed Auditor status will be awarded instead.
Grade calculation examples:
- Exam score of 64/100 + 20 days of audit experience: Confirmed Auditor – Intermediate level.
- Exam score of 58/100 + Lead Auditor experience: Confirmed Auditor – Elementary level (as the score is below 75, Lead Auditor status cannot be granted despite experience).
Certification Regulations
ISO 27001 Auditor personal certification is valid for 3 years.
At the end of this period, certified professionals must renew their certification by passing a new exam to extend the validity of their skills certificate.
Download the ISO/IEC 27001 Auditor Certification Regulations
Fees
Fees for our ISO 27001 Auditor certification exams can be viewed here.
Please note: OPCO funding options may apply.
Your Questions About ISO 27001 Auditor Certification
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What proof of experience must be provided to validate ISO/IEC 27001 Auditor or Lead Auditor certification?
When registering for the personnel certification exam, the candidate must submit the DT138 certificate along with official proof of experience provided by a client or employer. LSTI’s regulatory requirements vary depending on the certification status sought:
- For ISO/IEC 27001 Auditor certification: Proof of having conducted at least 20 days of audits against the ISO/IEC 27001 standard over the past three years.
- For ISO/IEC 27001 Lead Auditor certification: Proof of having conducted at least 20 days of audits against the ISO/IEC 27001 standard over the past three years, including at least 3 full audits performed in the role of audit leader, as well as a passing score on the advanced-level written exam.
- Without prior experience: Candidates who have not yet accumulated this field experience may still take the exam; if they pass the written exam, they will be granted temporary Provisional Auditor status. -
What is the difference between an ISO 27001 Lead Auditor and an ISO 27001 Lead Implementer?
Although they both work within the same framework, a Lead Auditor and a Lead Implementer play diametrically opposed roles within an ISMS.
The Lead Implementer is the architect who designs, deploys, and manages the security system on a day-to-day basis within the organization. Conversely, the Lead Auditor acts as an independent and impartial evaluator responsible for verifying the system’s compliance through evidence, without ever providing advice.
To uphold the fundamental principle of independence, a professional cannot serve as both the Lead Implementer and the Lead Auditor on the same project. -
How soon and how are the results of the LSTI exam communicated?
Certification decisions and scores are communicated individually to candidates by email within a maximum of 2 weeks after the exam. To comply with the strict confidentiality and impartiality requirements of ISO 17024, no results will be provided by phone. -
What materials are allowed on the day of the exam?
The certification exam administered by LSTI allows only the use of official standards (including the ISO/IEC 27001, ISO/IEC 27002, and ISO 19011 handbooks) in paper format. In order to accurately simulate the working conditions of an auditor in the field while preventing cheating, personal notes, training binders, laptops, and general internet access are strictly prohibited throughout the entire online exam. -
How can I verify the authenticity of an auditor certificate issued by LSTI?The validity of a certificate can be verified directly with LSTI. The certification body publishes and maintains a public registry of certified individuals on its website. This official registry allows employers, audit firms, and clients to instantly and transparently verify the active status of an auditor’s certificate of competence.
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Does LSTI offer ISO 27001 training courses?
No, LSTI does not offer any training programs. LSTI operates exclusively as an independent certification body. To take the exam, you can register as an independent candidate if you already possess the necessary skills, or enroll in a preparation course at one of the training organizations accredited by LSTI. This strict separation between training and the exam ensures the certification’s complete impartiality.
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Why Choose LSTI?
Recognized Expertise
With more than 20 years of experience, LSTI supports more than 300 organizations in France and Europe as a certification body and leading assessment center, operating in the fields of cybersecurity, digital trust, and information security.
Specialized Auditors
Our audit teams are composed of experienced professionals who are well-versed in ANSSI’s cybersecurity standards, information security management practices, and European digital trust frameworks. Their approach ensures rigorous, balanced assessments that are tailored to each organization’s operational context.
Independent Third Party and Dedicated Support
Accredited by ANSSI, LSTI ensures impartiality, transparency, and consistency throughout the entire process: preparation, audits, monitoring, and renewals. A dedicated point of contact ensures continuity and clarity throughout the certification process.