The Institution of Occupational Safety and Health (IOSH) is the world's largest health and safety membership body. Founded in 1945, it now represents around 45,000 members in more than 100 countries, working to make workplaces safer, healthier and more sustainable.

IOSH offers two well-known courses that are often confused with one another. IOSH Working Safely is aimed at all employees and covers the essentials of health and safety in the workplace, while IOSH Managing Safely is a three-day course aimed at managers, team leaders and supervisors, covering responsibilities for health and safety, hazard identification, risk assessment, accident investigation and measuring performance.

IOSH is also a chartered body, having gained a Royal Charter in 2002. Since 2005, it has awarded Chartered Safety and Health Practitioner status to recognise individual professionalism and ongoing commitment to learning and development.

As for who delivers the training, IOSH courses are run by IOSH licensed trainers, who must hold suitable qualifications and experience before being approved to run the courses. This ensures consistent quality and content standards wherever an IOSH course is delivered.

The reach of this training is considerable: IOSH courses combine up-to-date theory and practice, enabling around 100,000 people a year to earn IOSH awards, making it one of the most widely recognised routes into workplace health and safety competence.