The more nonprofits become challenged by resource shortages, the higher the demand for highly skilled executive directors. Nevertheless, we do not yet fully understand what motivates executive directors to work in nonprofits challenged by market forces. This article explores the career context and individual biographies of executive directors. Introducing a career field and career capital approach to the study of careers in nonprofits, we analyze what influences the career of executive directors of German faith-based social service organizations. The results of 23 interviews and four focus groups with 60 participants are twofold. First, four types of career capital influenced the executive directors’ career: Experience of solidarity, orientation to social service, skills for executive function, and leadership by appointment. Second, all careers were highly influenced by the experience of solidarity. The article ends by explaining why experience of solidarity is important for training and selecting nonprofit executive directors.