This document summarizes research on Machiavellianism and how those high in Machiavellian traits behave in organizational settings. It discusses how Machiavellians are motivated by self-interest and impression management rather than pro-social values. While they may engage in some organizational citizenship behaviors to benefit themselves, their lack of empathy and willingness to manipulate others makes long-term relationships difficult. Overall, those high in Machiavellian traits tend to fare poorly in organizations that value cooperation and the well-being of all members.