His research focuses on climate change policy, energy policy, and mortality risk valuation. He also serves as the Faculty Chair of the Mossavar-Rahmani Center for Business and Government Regulatory Policy Program. In 2009–2010, he served as the Special Assistant to the President for Energy and Environment at the White House. Aldy previously served as a Fellow at Resources for the Future (2005–2008), worked on the staff to the President’s Council of Economic Advisers (1997–2000), and served as the Co-Director of the Harvard Project on International Climate Agreements and Co-Director of the International Energy Workshop.