When an organisation changes, grows, or new units join into a corporation, it generates challenges for health and safety (HS) management. There are different types of HS tools, systems, applications, forms and software which support HS management. The purpose of this research is to find out what kind of HS management practices and tools are used and what is required to manage HS efficiently within a global steel company's (Nemployees = 15.000) different sites. All the sites (N = 6) had a health and safety management system, which was based on OHSAS 18001 requirements. Local HS management practices and tools varied significantly, but had similar backgrounds. Corporate HS management was based around HS standards, vision and principles, plans and targets. Similarly, it also followed OHSAS requirements. Some improvement needs have been identified for both the local and the corporate level HS management practices and tools. It is possible to manage HS in a continuously changing organisation. The foundations should be based on corporate HS standards, which should be outlined clearly - based on the desired end result complying with the external requirements.