The subject of this Co-learning Plan is an investigation into the role that the U.S. government can play in circular economy (CE) transitions. The project works to consolidate existing international work in the field by studying transition strategies and determining transferable knowledge that can be employed in the U.S. to compliment top-down decarbonization efforts. It will explore the actors driving these transitions, the policies promoting their emergence, and the literature arguing their calculation. The study will achieve this by conducting 1) literature reviews of non-U.S. and U.S. progress in manifesting a CE transition; and 2) outreach with personnel who have engaged in CE transition tools and methodologies. Findings will be consolidated into a published report and resources discovered along the course of the project will make up an appended annotated bibliography.