Mario Machado introduces himself and his qualifications and experience in workplace health and safety. He provides background on the new ISO 45001 standard which replaces ISO 18001 and aligns with other ISO standards. The new standard focuses on risk-based thinking, leadership engagement, and consultation/participation of workers. It also includes key changes like expanded definitions, requirements for determining scope and understanding organizational context, and planning actions to address risks and opportunities. The summary outlines the document's sections on the ISO 45001 structure and alignment with the PDCA cycle.