This qualitative study explores the role of identity in changing from a traditional, organisation-based career to a protean career path. Biographical narrative interviews were conducted with 12 prime-aged U.K. participants. Data were analysed using narrative and thematic analysis. Findings highlight the anchoring role of identity in transitioning to a career driven by values, and demonstrating adaptability in an unpredictable work environment. Findings are used to propose a definition of identity relevant to protean career changers, and to suggest that clear identity should be considered "the" core characteristic necessary for thriving in transitions to protean career paths. Career practitioners are advised to prioritise identity exploration with clients seeking to transition from an organisation-based career to pursue a self-directed, values-driven career path.