Although evidence from the latest media articles showcases that employees can push/drive environmental sustainability efforts in resistant organizations (Acaroglu, 2020; Shastry, 2021), there is no clear understanding of how and when this occurs. Additionally, research on corporate sustainability aimed to enhance organizations’ environmental sustainability lack behavioral studies. We resolve this by investigating the intrapersonal moral conflict experienced by employees concerning corporate sustainability using a multi-method approach (survey and experiment) from a cross-cultural angle (India and U.S). Specifically, we seek to examine how employees’ moral conflict arising from their views of their organization’s bottom-line mentality can lead to sustainability behaviors via discrete moral emotions of anger and guilt. Through three studies, we establish the presence and importance of employee’s sustainability-related moral conflict, assess the role of cognitive emotion regulation in aiding employees to channel their moral emotions in productive ways. Based on the findings from a pilot qualitative exploratory investigation, study 1 uses a cross-sectional survey on 286 full-time employees recruited through MTurk to verify the moderating role of bottom-line mentality on moral conflict. Further, in study 2, using a multi-wave survey of (T1=600, T2=400) employees on MTurk, a moderated mediation relationship was tested to showcase the role of moral emotions in mediating moral conflict and involvement in sustainability actions in the presence of cognitive emotion regulation. Results show that high (low) cognitive emotion regulation is associated with low (high) anger and high (low) involvement in corporate sustainability inside the organization (intention of sustainability behavior). Results from study 3, N=100, 2X2 between-subject experiment show that high (low) cognitive emotion regulation is associated with high (low) anger and high (low) sustainability donation behavior outside the organization. We also discuss the theoretical and practical implications of this research.