Due to the nature of the activities performed, the welding position in the metal-mechanical processes exposes its workers to various risks that generate severe damage to their safety and health, affecting both the worker and the company due to the loss of man hours due to medical breaks that impact on lower productivity, as well as economic losses. Dysergonomic risk deserves special attention due to the high frequency and severe consequences of Musculoskeletal Trauma that it can generate in its workers, and in this sense the objective of the research is to improve the productivity of the welding position through the prevention of dysergonomic risk by providing an occupational health management model for its application. By means of the Nordic Standardized Questionnaire, the analysis of musculoskeletal symptoms was carried out, selecting as object of study the welding activities performed for the modification of excavator buckets, observing as risk factors the postural effort and the manual shuffling of parts, from which the REBA (Rapid Entire Body Assessment) and the NIOSH (The National Institute for Occupational Safety and Health) methods were selected for the evaluation of the dysergonomic risk. In conclusion, an 11% increase in average productivity levels has been achieved.