OHSAS 18001 is an international occupational health and safety management system standard. It requires organizations to implement a management system to identify hazards and assess risks, put controls in place to mitigate risks, and continually improve occupational health and safety performance. The standard outlines requirements for policy, planning, implementation and operation, performance evaluation, and management review to drive continual improvement. Organizations can seek third-party certification to the standard to verify conformance with its requirements.