The objective of this research is to establish the relationship between quality of work life, self-esteem and job performance in a sample of 447 professionals of different specialties who work in public and private organizations in Perú and who were studying postgraduate studies (second specialty, master's and doctorate programs) in several universities, to whom three reliable and valid instruments were applied. The results showed a high level of quality of work life, self-esteem and high performance, decreasing this percentage to a moderate level and then to the low level. On the other hand, there is a significant and positive correlation between quality of work life, self-esteem and job performance, allowing to deduce that the higher the quality of working life, the level of self-esteem improves and as a consequence there is a job performance improvement. The analysis of the quality o...