The objective of most social security scheme is to provide access to means of earning.rnPension systems ease the retired, injured, incapacitated workers from the burden of laborrnwhen these workers productivity has fallen to a low level. Work injury schemes are thernoldest and most widespread form of social security that are playing an increasinglyrnimportant role in rehabilitating workers who fall victim. Similarly sickness benefits contribute to the recovery of sick workers by adjusting orrnremoving the financial pressure on them to some extent while they are ill . Child benefitsrnare other set of schemes that help to ensure the families with children have enoughrnincome to provide proper nutrition and a healthy living environment for their children.Social security programs III Ethiopia provide social security services Iii the form ofrnpension. The major services focus on pension schemes such as , retirement age pension,rninvalidity pension, incapacity pension, and survivors' pension. However, in a country like Ethiopia, w here the fertility rate is optimal, and the number ofrncivil servants working in public institutions is increasing alarmingly, the need forrndeveloping and strengthening social security programs are vital. Customers should berneducated about the social security category status that they belongs to , and also getrnconfined about the amount of one time or life long payments they deserve.In an attempt to address such problems, the present study, specifically, explores thernpotential of app lying Expert Systems Technology in determining social security status ofrnthe civil servants, considering the Ethiopian Social Security System as a case stud y. Arnprototype Expert system on Social Security Determination, (ExpSSD), is developed byrnexploring the existing expert know-how and existing procedures in decision making inrnthe area of social security as source of knowledge.Modeling the knowledge acquired has been madhouse hierarchical structure thatrnrepresents concepts and parameters involved in social security determination. Based onrnthe model and using production rules , the knowledge has been represented . Using anrnexpert system shell , know as, Knowledge Pro Gold, the rules were materialized to thernprototype system. Back ward reasoning is used in inferring the rules and extractingrnresults.The prototype system (ExpSSD) was validated and verified using some cases and provedrncorrect when matched with the decisions made earlier by human experts. The expertsrnparticipated in the testing of the system has also suggested that, the scope of the rules hasrnto be broaden encapsulating largely the civil laws of the country.