In this research, we validated the French-language version of the Protean and Boundaryless Career Attitudes Scales and then investigated relationships among protean and boundaryless career orientations, proactive personality, career adaptability, and career satisfaction. Study 1 results demonstrated acceptable psychometric proprieties for the scales using an innovative translation (N ¼ 49) and verification (N ¼ 228) method. Study 2 answered how and to what extent protean and boundaryless career orientations are related to career satisfaction in a convenient and heterogeneous sample of employees (N ¼ 234) in the French-speaking part of Switzerland. Correlational, regression analysis, and structural equation modeling techniques were used to test the hypotheses. Career adaptability mediated the positive relationship between protean and boundaryless career orientations and career satisfaction. These findings highlight the explanatory utility of career adaptability in relationships of protean and boundaryless career orientations to career satisfaction. Future research and career counseling implications also are discussed.