His research explores how sustainability is interpreted, contested, materialized and settled in science and technology policy and infrastructure design. He is on the Executive Management Team for the National Science Foundation-funded Urban Resilience to Extremes Sustainability Research Network, and co-PI of the NSF-funded STIR Cities project. His recent book, Reconstructing Sustainability Science: Knowledge and Action for a Sustainable Future, part of the Earthscan Routledge Science in Society Series, examines how scientists can navigate epistemic and normative tensions to link knowledge to social action.