Integrity, a significant concept in western ethics, emphasises the idea of the Self being an integrated whole, consistent with itself and moral obligations. Contemporary frameworks such as the Inner Development Goals (IDG, 2019) reflect the importance of integrity in promoting sustainability. While the humanistic understanding of integrity has become widely accepted, its traditional notion presents challenges in managing sustainability both theoretically and practically. This research attempts to discover how it might be possible to conceptualise personal integrity differently. I explore how the perception, comprehension, and experience of integrity is transforming within the realm of sustainability together with sustainability professionals working in Sweden and Denmark and posthumanist thinkers with the help of postqualitative inquiry. The concept of integrity is examined within organisational dynamics, specifically concerning the relations between professionals and their organisations. Drawing inspiration from Donna Haraway's concepts of ‘staying with the trouble’ and ‘tentacular thinking’, as well as the posthuman notion of care, I delve into the complex moral experience of my interlocutors who find themselves closely aligned with the posthuman paradigm. At the same time, organisations mainly approach the organisational roles of sustainability professionals within the conventional business-as-usual narrative.