This paper examines how school leaders working within schools serving immigrant English Learners negotiate teacher evaluation policies, including how they influence compliance with mandated policies, communicate those policies to teachers, and guide implementation within their professional communities. We explore how a leader in a school with positive outcomes negotiates external policies to support authentic professional growth and maximize learning opportunities for immigrant ELs. In addition, we draw on data from a comparison school that also serves a high proportion of ELs, but where policies have been enacted in ways that focus on compliance, increase anxiety, and add little value to EL students. In doing so, we show how leaders can mitigate the unintended consequences of mandated policies by addressing teachers' uncertainty and anxieties, while reaffirming humanizing institutional practices that honor the local knowledge of teachers and deepen teachers' collective responsibility for immigrant youth.