The current literature on environmental sustainability acknowledges that habits are often shaped in private life and that experiences with environmental activities in a non-work setting positively influence environmental behaviors in the work domain. However, the conditions that lead individuals to behave responsibly at work based on their environmental commitment outside the workplace remain poorly understood. We address this issue by pursuing two objectives. First, we outline archetypes of environmental behavior on and off the job and classify individuals into four profiles: Apathetic, Conformist, Citizen and Enthusiast. Second, we examine a set of organizational and psychological variables that explain the likelihood of behaving in accordance with the principles of an archetype in terms of pro-environmental behavior at work. Our findings show that supervisory support, job self-efficacy and affective commitment increase the likelihood of being green at work but that environmental management practices do not. The results differ according to the profiles identified, allowing a better understanding of employees’ commitment to environmental sustainability. We conclude the paper by discussing the theoretical and managerial implications of our findings.