The collaboration and learning of high school English language learner (ELL) teachers is an overlooked aspect of policy and research regarding the opportunities and outcomes of emergent bilingual (EB) students. In order to better understand the work of ELL teachers, this study examined their participation in an important setting: the professional learning community (PLC), a space with potential for promoting more equitable student outcomes. Analysis of ELL teachers' participation in PLCs at two urban high schools, and the topics addressed in PLC meetings, provides implications for teacher and student learning, and reinforces the significance of ELL teacher expertise.