Faced with the need to develop more responsible models of human resource management (HRM), the aim of this research is to develop a measurement instrument that allows the systematic assessment of sustainable HRM systems. The research provides a comprehensive framework of analysis for evaluating HRM sustainability by relying on the sustainability approach. The article proposes an evaluation of sustainable HRM systems per their balanced application of corporate social responsibility (CSR) principles. The research identifies the different CSR dimensions that characterize sustainable HRM systems, creates the measurement instrument, and theoretically—through a Delphi study—and empirically validates this measure on a sample of European firms.