Most Popular Occupational NEBOSH Process Safety Management (PSM) Course The NEBOSH Process Safety Management (PSM) is one of the best qualification in Occupational Health and Safety Management which is specially developed for those who works in the process industries such as chemicals, plastics, pharmaceuticals, oil & gas, etc‌ This NEBOSH PSM course has been developed by the NEBOSH board with collaboration of Great Britain’s Health and Safety Regulator, the Health and Safety Executive (HSE).