The purpose of this study is to propose and discuss a conceptual model for investigating the factors responsible for influencing the adoption and success of human resource information systems (HRIS) in public sector organizations in Saudi Arabia. It reviews empirical studies of IT adoption and success at the user level in general and with particular reference to HRIS adoption. While a few studies have investigated the adoption and success of HRIS in the Middle East, none was set in Saudi Arabia. Given the mandatory use of such systems in Saudi public organizations, this paper proposes a framework combining the Unified Theory of Acceptance and Use of Technology with the DeLone and McLean IS success model. The paper justifies the constructs included and formulates 17 hypotheses describing the adoption and success of HRIS. It ends by discussing the contribution and limitations of the study and the direction of future research.