Academic, scientific or professional interest: Protection of public health is a fundamental right recognised in the article 43 of the Spanish Constitution, where it also refers to the responsibility that the public authorities have in “organising and managing public health through preventive measures and the necessary benefits and services”. Health, understood as a state of physical, psychic and social well-being, according to the well-known definition of the World Health Organisation, in its individual as well as collective dimension, is determined by factors both of biological as well as environmental and social nature. The places and conditions in which the work is carried out are the main health and public well-being determinants, therefore require of the suitable assessment and control actions that guarantee the protection of worker’s health. In the pursuit of this responsibility, in 1995 the Spanish Occupational Health and Safety Law (Law 31/1995) is approved, regulatory framework by which a series of principles and organisational and technical provisions are established to guarantee the protection of health of the workers in Spain. Thus, companies must guarantee that the conditions and organisation of work are safe and healthy, being responsible in this both the directors and decision-makers in the work centres, as well as workers, with rights and obligations concerning labour risks, and the management office itself, guarantor of the fulfilment of the regulatory provisions and objectives in this field. This Law establishes the different modalities with which, compulsorily, must organise all the companies to guarantee the fulfilment of their obligations in terms of labour risk prevention. The designated Occupational Health and Safety Services become one of the main resources with which the companies count for the guidance and technical support that requires intervention in terms of health and security at work. In its turn, both in the modality of internal and external prevention services, these bodies should count with all the facilities, human resources and materials needed to carry out the preventive activities that the company is to perform. In particular, the regulation establishes that between the trained personnel in these services are technicians with the suitable training to carry out higher level functions. The future professionals in the field of occupational health and safety require a series of basic competences for which its acquisition the best guarantee is this postgraduate university training.