David is the director of government affairs for the Natural Resources Defense Council. In that role, he is responsible for NRDC's overall political strategy, bringing together NRDC's interactions with Congress, the Administration, and, through the NRDC Action Fund, the public. He served as chief of staff of the House Committee on Science from 2001 through 2006, the culmination of more than 20 years on Capitol Hill working primarily on science policy and environmental policy.
After leaving Capitol Hill, David was a visiting lecturer at Princeton and Harvard, and a columnist for the journal Nature. He was also the project director for the Bipartisan Policy Center report "Improving the Use of Science in Regulatory Policy." He has served on several panels at the National Academy of Sciences.