Book excerpt: This handbook explains how an organization can use a management system to both control and improve its safety or occupational health and safety performance. It provides guidance in building the OH&S management system in support of the organization’s operations, linking the management system to the requirements of ISO 45001:2018, to support third-party certification. Included in the text are best practices as well as common pitfalls or weaknesses I have observed in various organizations. For those organizations certified according to OHSAS 18001:2007, the book highlights the changes required to upgrade to the new international standard. The ISO 45001:2018 Implementation Handbook is formatted to describe each clause of ISO 45001:2018 in four sections: 1. Correspondence with the current OHSAS 18001 standard2. The ISO requirement3. Guidance on conformance to the requirements4. Questions for internal auditors A CD included with this handbook contains internal auditor check sheets that can be used to assess conformance to ISO 45001:2018.