The General Organization for Social Insurance (GOSI) is the national authority to administer social insurance schemes for wage earning workers. GOSI had IT systems that were developed approximately 20 years ago. Also, service delivery problems, increasing administrative overheads, increasing difficulties in implementing apparently modest changes in the IT systems and anticipated changes in the schemes as mandated by law are pushing GOSI to go in for a new system using state-of-the-art technology that will be a solution to the above problems. The new system called SIMIS (Social Insurance and Management Information System) is a customized enterprise resource planning (ERP) that developed in-house to administer Social Insurance schemes to the working population of Saudi Arabia, through their respective employers. The schemes are the occupational hazards (for hospital treatments and related benefits) and annuities (for old age, disability and heirs) as governed and administered in compliance with the regulations. SIMIS also supports GOSI in the various administrative functions such as Investment management, Real Estate management, etc. SIMIS is helping GOSI in improving the quality levels of service, achieving an improvement in ratio between contribution income and administrative cost, and improve administrative efficiency.