The purpose of this study was to design a competency model based on the description of competency dimensions and decision making style of managers. The statistical population of this study included senior, basic and middle managers of social security organization (2764 persons). The research method is descriptive-survey and the data collection was done using the questionnaire of macro competencies, dimensions of competencies of managers whose validity were 91.5, 9.9.9 and 0.86, respectively. Data were analyzed using descriptive and inferential statistical methods and tests such as Pearson's correlation coefficient, univariate t-test, Kolmogorov-Smirnov test and exploratory and confirmatory factor analysis using SPSS 21, MINITAB software, Version 17 and LISREL version 8/8 are used. Considering the mean obtained for variables of macro competence, their competency dimensions and decision making style in social security organization, it can be said that these variables are too satisfactory. The results indicate that there is a significant relationship between the areas of high competence with the dimensions of managerial competence in social security organization. It was also found that there is a significant relationship between the components of the individual domain, the technical domain, and the interactive domain with the dimensions of managerial competence in the social security organization.