The assessment, diagnosis and monitoring of the symptoms of PSPT are basic steps in the clinical and research work to be carried out by health professionals working in mental health and in the area of psychological trauma, namely psychiatrists and clinical and health psychologists. In the evaluation of the PSPT we find, on the one hand, the shortage of adapted, validated and updated instruments for the Portuguese population and, on the other hand, the shortage of reduced versions of the self-report instruments, of rapid application in clinical practice and for the purpose of screening and monitoring of individuals. In this context, two instruments of clinical utility and congruent with the criteria postulated in the DSM-V stand out, namely the PCL-5 (Weathers, Litz et al., 2013), an instrument for the assessment of symptoms and the probable diagnosis of PSPT, and the National Stressful Events Survey PTSD Short Scale NSESSS-PTSD (Kilpatrick, Resnick & Friedman, 2013), used to identify the degree of severity of PTSD symptoms in the general and clinical population. This research project has as main objectives the translation of the respective instruments into the Portuguese language, as well as their validation and assessment for the Portuguese population, in a comprehensive sample of civilian and military population. The main contributions to clinical practice and research on the theme of PSPT are highlighted, in which it would be possible to make a more informed assessment and diagnosis that is consistent with the current criteria, useful not only for the military population but also for the general Portuguese population.