In the light of developing technology, increasing of technology-based organizations cause project-based work and working groups that are commonly occurred in these organizations to increase in number. Therefore, the result of employee's fit/misfit with the group gains importance for organizations. The effect of employees' fit with their group on their satisfaction with supervisor is investigated in this research. Person-group fit is examined by means of 3 dimensions: the employees' perception about demographic similarity with group members (relational demography, similarity of personal values with group values, and congruence of personality traits with group members' ones. 124 working group-sampling (640 employees) is selected at technology-based organizations. According to findings, employees' perception of demographic similarity concerning group (47 %) and value fit (35 %) affect satisfaction with supervisor, positively as expected. Contrary to expectations, personality traits similarity with group members explains the variance in the satisfaction with supervisor, negatively (28%). The findings highlight complementary fit concerning personality traits for the group in addition to supplementary fit.