Section 55 of the 1974 Act defines the Service's purpose as:
Securing that the Secretary of State (as of 2009 the Secretary of State for Work and Pensions), the Health and Safety Executive and others concerned with the health of employed persons or trainees are informed of and advised about matters relevant to the safeguarding and improvement of the health of employees and trainees;
Giving employees and trainees relevant information and advice on health; and
Other purposes of the Secretary of State's functions relating to employment.