Employees can contribute to organizational greening by engaging in green behaviors voluntarily. This work examines the role of four antecedents from an organizational context in the promotion of employees' voluntary pro‐environmental behavior at work: job satisfaction, perceived organizational support, employee affective commitment (EAC), and perceived organizational environmental support (POES), which are directly and indirectly related to voluntary pro‐environmental behavior at work. We also test the moderating effect of POES. We empirically test the proposed hypotheses using SEM with a sample of 331 banking employees from two countries, Ecuador and Kazakhstan. Results demonstrate statistically significant relationships between the proposed antecedents of voluntary pro‐environmental behavior at work, showing the mediating role of EAC, as well as the moderating role of POES.