The use of teacher peer groups is a prevalent strategy for school-based professional development and instructional improvement. Facilitation of such groups is an increasingly vital dimension of teacher leadership as a component of school improvement efforts. Drawing on a qualitative study of facilitation of teacher peer groups, the article investigates how teacher leaders integrate experiences from different domains of life in constructing a unique facilitator identity. Focusing on portraits of three teacher leaders, it demonstrates how teachers relate experiences outside of teaching, including academic experiences, other professional experiences, and social experiences, to the skills and orientation necessary for effective facilitation. The article argues for attention to reflexive practices of identity formation in the preparation of teacher leaders as facilitators and in the ongoing development of teacher leaders who already function as facilitators.