What is OHSAS 18001? BS OHSAS 18001 is an internationally recognised British standard for occupational health and safety management. It enables organisations to manage risk and help aid compliance with legislation, as well as maintain a safe and healthy working environment for employees, visitors and others. Who is it for? OHSAS 18001 is suitable for any organisation that wants a robust health and safety management system. This is especially important in high risk industries such as construction, manufacturing and logistics.