The present study is built on the interface of the assumptions of psychodiagnosis through the subjective components of the life of a subject who works as a sergeant in the Military Police of the Federal District. The social relations of this subject acquire importance to the extent that the uniqueness and complexity of everyday life appear linked to the challenges caused by police work issues. To advance this theme, the research presents an analysis from a case study on the relationship of work in the social life of a police officer in action. The general objective was to investigate the impact of police work on the subject's relational context, with a view to analysing the role of psychological assessment in investigating the stress characteristic of police work and dynamic aspects of the personality of the subject participating in the case study, as specific objectives. It was also focused in the discussion of this research a convergence between the concept of psychological aspects through psychodiagnosis and the health of the worker; as a component of the subjectivity process.