The aim of this study is to contribute to a pragmatic understanding of critical information literacy (CIL) by positioning it as a context-specific interpersonal practice. Using phenomenography to explore how information work is experienced by social workers in social and health care settings, this paper provides an example of critical information practice that can be used to operationalise and activate CIL as a theory and inform approaches to critical pedagogy. CIL as a concept is generally theorised, practiced, and taught in academic contexts, and relatively few examples of how theory can be defined and put into practice outside a classroom setting are available. This study builds on our understanding of CIL by exploring professional information practice and suggests a model for teaching to engage learners in connecting information to action in social systems.