The aim of the present research is to investigate the perceptions of Greek firms’ managers on the environment and environmental sustainability strategies. Data were collected using a structured questionnaire distributed to a wide range of firms operating in Greece. Managers’ perceptions on the environment were measured using the New Ecological Paradigm (NEP) Scale and were statistically analyzed. The research findings highlight the environmental attitudes of the managers and how they are connected with the firms’ environmental sustainability strategies. More specifically, the results of this study provide evidence on how environmental attitudes of top management can affect a firm’s both environmental sustainability performance.