One of the serious problems that occur in any productive or operational system is the lack of culture of prevention and safety at work, resulting in occupational accidents that cause serious injuries or even death. This article presents the case of workers from the Drinking Water Company in the area of construction and maintenance of sewage networks. Its objective was to determine the need for training and the design of andragogic methods to strengthen the culture of prevention. This work is an exploratory type research, in which the inductive method of investigation was used. In order to know about occupational health and safety, and the use of safe work rules and procedures, a diagnosis was made, by means of various information gathering techniques, including job analysis. As a result, the establishment of the degree of knowledge and the shortcomings of training were obtained, allowing the production of appropriate themes with the use of andragogic training models which directly imply the establishment of a preventive culture.