This paper presents an examination of identity "in" and "as" practice as it relates to a group of educational practitioners known as middle leaders. Drawing on the theory of practice architectures as a site-ontological approach for conceptualising educational leading, the paper considers an individual's identity as being informed by, and accomplished amidst, the sayings, doings and relatings of practice. Although theorising the connections between identity and practice is not new, a central argument presented is that identity occurs at the nexus of the individual and social practices. Data are drawn from an empirical study of the practices of nine middle leaders responsible for facilitating a district-wide initiative aiming to improve literacy pedagogy in their particular primary schools. Thematic analysis of semi-structured interviews with the middle leaders revealed 11 identity-practice framings which evolve over time and space, negotiated in response to site-based conditions. Findings contribute to understandings about the dynamic multifaceted nature of middle leaders' identities.