In recent years, several issues such as environmental evolution, uncertainty about future, costs increase, expansion of the organizations and legal constrains have made the organizations to change their paradigm. In this regard, the preliminary idea of outsourcing the social security services was introduced by the Iranian Social Security Organization (ISSO) in 1995 in order to prevent the expansion of executive sectors of the ISSO, decreasing the administrative and staffing costs, facilitating and accelerating the insured and employers affairs to increase the social partners satisfaction.