By Girija Togarati, ISO/IEC 27001 Lead Auditor (CISA, CCSK). Reviewed by Murty Nisthala, Director, Audit and Assessment Services (CISA, CISSP, CCSP).

ISO 27001 certification follows a defined process that ends in a two stage audit by an accredited certification body. Here is what to expect at each step.

Build the ISMS

You start with a gap analysis, then define the ISMS scope, run a risk assessment, select Annex A controls, and document the Statement of Applicability. You implement the controls and train your team.

Internal audit and management review

Before the external audit, you run an internal audit to confirm the ISMS works and a management review so leadership signs off. Non conformities are closed.

Stage 1 and Stage 2

The certification body conducts Stage 1, a documentation review, then Stage 2, where it verifies that your ISMS is implemented and effective. When you pass, it issues the ISO 27001 certificate, valid for three years with annual surveillance audits.

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