The most valid accredited certificate programs among these trainings are as follows:
-NEBOSH (NEBOSH IGC3 Certificate)
-OSHA (Occupational Safety and Health Professional Certificates)
-IOSH (Management Safely)
NEBOSH is the UK occupational health and safety testing agency. It was established in 1979 and has members from IOSH, HSE and other similar institutions under its management. Each year, an average of 35,000 people take NEBOSH exams from more than 100 countries around the world.