Opus Health and Safety has won a contract to provide health and safety support to the National Museums & Galleries of Wales.
The Cardiff-based firm has been awarded a three-year contract.
Opus said it would provide comprehensive training and support services to the museums' in-house team.
More than a million people visit the various museum and gallery sites throughout Wales each year, said Opus.
Opus health and safety managing director Richard Pask said: “Effective health and safety management is one of the most crucial business issues facing organisations today.