As a Senior Fellow and economist at Ecologic Institute, Aaron Best focuses on economic issues related to environmental policy. His project work includes climate policy, sustainable development indicators, circular economy, cost-benefit analysis, economic valuation of environmental goods and services, and environmentally harmful subsidies. He coordinates Ecologic Institute's data analysis team. Aaron is a native English speaker and speaks fluent German. He also has a working knowledge of Spanish.

Aaron Best's work also focuses on issues related to transatlantic policymaking as well as the interplay of trade and the environment. He has provided economic analysis for Ecologic Institute studies on the interplay of climate and trade policy, including work for the European Parliament’s international trade committee. In addition to his research and writing, Aaron Best was previously manager of the Transatlantic Program, overseeing several of Ecologic Institute's transatlantic initiatives, including the Transatlantic Fellows and Transatlantic Interns programs. As a U.S. citizen living in Berlin, he also speaks on transatlantic environmental issues.

Aaron Best headed the Horizon 2020 project "Measuring the IMPACTS of the Transition to the CIRCULAR Economy" (CIRCULAR IMPACTS), which further developed the evidence base on the EU transition to a more circular economy. He led the project team organising the high-level conference "Measuring Progress, True Wealth, and the Well-being of Nations" (Beyond GDP). He also managed a review of the Ecological Footprint and other resource indicators for the European Commission and contributed to several climate-related projects for both EU and German institutions.