Existing research on career motivations tends to focus either on the difference between private and public organizations or on the difference between nonprofit and for-profit firms. Although commonalities exist, the literature suggests that there also are many differences in what motivates public and nonprofit employees. Employing data from the National Administrative Studies Project III, this research examines how seven motivational aspects correlate with the choice between public and nonprofit employment. The authors find that managers who value advancement opportunities, a pension and retirement plan, and the ability to serve the public in their jobs are more likely to accept a job in the public sector, whereas managers who value family-friendly policies and increased responsibility are more likely to accept a position in the nonprofit sector. Participation in volunteering is positively associated with nonprofit employment. The authors suggest a possible link between volunteering and the unique nonprofit motivation that is differentiated from public service motivation.