This timely work reflects on the role and obligations of the state as a buyer of goods and services, from the dual disciplinary perspectives of public procurement and human rights. Through theoretical and doctrinal analyses, and practice-focused case studies, it interrogates the evolving character of public procurement as an interface for multiple normative regimes and competing policies. Challenging the prevailing paradigm which subordinates human rights to narrowly-defined economic goals, insightful contributions advance a compelling case for greater inter-disciplinarity and policy coherence as crucial to realising international policies such as those embodied in the UN Guiding Principles on Business and Human Rights and 2030 Sustainable Development Goals.