We highlight three ways of conceptualising and enacting academic development: firstly as authentic, practice-based activity, secondly in terms of a new transformative paradigm for academic development units (ADUs), and thirdly as a space for disruption. We illustrate these conceptualisations through our investigation of the practice of internal secondment of faculty to ADUs. We report our findings from a sector-wide survey of Scottish higher education institutions and a series of in-depth interviews with secondees and their managers in two Scottish universities. We recommend further investigations to identify new ways of enacting authentic, practice-based, transformative, and disruptive academic development.