The current study tested core dimensions of the job characteristics model (JCM) among extension workers in Egyptian agricultural extension system. Agricultural extension system was chosen due to its Expected importance in achieving sustainable agricultural strategy 2030. The paper examines the effect of core job dimensions (skill variety, task identity, task significance, autonomy, and feedback) on both affective responses represented by satisfaction, and behavioral responses represented by performance. Data were collected by group interview from 230 extension workers in Dakahalia and Qena governorates. Frequencies, percentages, arithmetic mean, reliability coefficient, multiple correlation, and multiple regression were used to analyze data statistically. Regression analysis revealed performance was not related to the core job dimensions while satisfaction was. The findings of    this study offer several implications for the JCM as a theory especially, in agreement with most research, due to ability of job characteristics to predict levels of job satisfaction.