Maike Keil ^* Valerie Michaux Martina Ziefle Katrin Arning

• RWTH Aachen University, Aachen, Germany

Addressing climate change requires both individual behavioural change and corporate transformation, as organisations play a crucial role in a sustainable society. How sustainability in organisations is perceived and implemented, depends on diverse factors such as management practices, communication, individual attitudes, and behaviours of leaders and employees. However, current research only investigates factors that affect the implementation of sustainable development and practices separately. Hence, holistic approaches are required to provide insight into how they affect a company's sustainability efforts. A quantitative online survey with n = 87 employees was conducted in Germany in 2023. The Corporate Sustainability Index (CSI) was developed to indicate the extent to which organisations implement sustainability into their policies and concrete practices. To investigate which factors predict corporate sustainability, we analysed employee-, management-, and organisation-related factors using multiple linear regression analysis. Institutionalised responsibility for sustainability was the strongest predictor of the CSI, along with a top-down approach to implement corporate sustainability. In contrast, employees' environmental awareness and their organisational citizenship behaviour towards the environment were not related to CSI. Our results stress the importance of leaders with an environmental focus as role models who can drive the transformation towards effective sustainability management in companies. This study offers important insights into the prerequisites for leaders to foster an environmentally responsible culture in their organisations.