AbstractDespite the challenges Muslims face because of their stigmatized religious identity, little is known about how they navigate that identity in the workplace. Adopting an interpretivist perspective of identity work, this study investigates this issue by building on two‐round in‐depth interviews (35 in round‐one and 21 in round‐two) with skilled practising British Muslim professionals. It extends work on power positions to show the privileges those in senior managerial positions have, including assertiveness and control over workplace interactions and outcomes. It further advances understanding of authenticity, revealing that, despite their experiences of stigmatization, these professionals tend to remain true to their religious identity, openly practising their religion in the workplace. They perceive identity re‐interpretation to be part of authenticity, and a responsibility to contest religious stigma. Importantly, this study conceptualizes proactive religious coping as an identity work response to workplace stigmatization, theorized in this organizational context as turning to God and religious rituals for meaning, comfort, resilience and reconciliation, whilst also being proactive and fighting to challenge experiences of stigmatization. However, unlike for other stigmatized groups, inclusive organizational practices, particularly religious accommodation, are not a driver for authenticity, but rather a signal for environment‐fit and authenticity is instead driven by religious identity.