My research revolves around three converging streams. The first stream focuses on the role of psychological contracts in employment relationships. Psychological contracts are stable mental models that represent the perceived promises employees believe that the employer is obligated to fulfil in exchange for their efforts. With specific reference to maintenance of psychological contracts, my research investigates the negative ramifications of psychological contract breach (i.e., failure on the part of the organization to fulfil promised obligations) and the salient role of socio-psychological mediators and personality moderators on a wide spectrum of workplace attitudes and behaviors. A second related research stream is unravelling the dark side of human behavior in organizations. It involves the measurement and prediction of workplace deviance and abusive leadership. My program of research explicates the explanatory mechanisms underlying workplace deviance and abusive leadership as well as identifying key antecedents and resulting consequences in work and non-work contexts. The third research stream focuses on the role of support and barriers in predicting career persistence in both educational and work contexts.