This study empirically examines factors that can influence the sustainable corporate performance of Korean business-to-business (B2B) companies with the help of unique survey data. Factors such as technological capability, the chief executive officer (CEO)’s risk-taking propensity, B2B seller skill, and key account management (KAM) are analyzed to clarify their impact on sustainable financial and non-financial performance. In particular, given that environment, society, and governance (ESG) reporting has recently been widely recognized as an important evaluation factor for companies, we look at the mediating effects of ESG management on sustainable business performance. The results show that the CEO’s risk-taking propensity and B2B seller skill significantly impact the company’s sustainable financial performance, while technological capability and the CEO’s risk-taking propensity significantly impact sustainable non-financial performance. The fact that a CEO’s risk-taking propensity affects both sustainable financial and non-financial performance indicates the importance of entrepreneurial competency in the sustainability of the company. Furthermore, the findings reveal that ESG management plays a crucial role in sustainable corporate performance. The mediating role of ESG management allows technological capability, B2B seller skill, and KAM to influence sustainable financial performance significantly. Likewise, all of the explanatory factors contribute to the company’s sustainable non-financial performance through ESG management. The findings are important for both practitioners and scholars because they emphasize the need to establish an optimal ESG management strategy for corporate survival and sustainability. Furthermore, this study underscores that ESG management should be implemented by all organizational members, from CEOs to employees. Future research will include more comprehensive samples and analyze various strategic factors not covered in this study to derive effective ways by which companies can increase their performance and sustainability. We will also explore the factors that contribute to good ESG management practices.