Any Occupational Health and Safety (OHSMS) Management system specifies processes to continuously improve your OHSMS performance and at the same time, comply with legislation. ISO 45001:2018 MIGRATION (OHSMS) LEAD AUDITOR TRAINING provides the framework to seamlessly integrate the OH&S management system with your overall business plan.iso 45001 migration lead auditor training is an international occupational health and safety management system specification that empowers an organization to control its OHSMS risks and improve its performance.