Previously, he was an attorney in private practice in Sidley Austin’s environmental group. Before joining Sidley, he was Senior Campaigner for the Environmental Investigation Agency (EIA), a nongovernmental organization that investigates international environmental crime, where he oversaw EIA’s U.S.-based work on illegal logging and the illegal trade in ozone-depleting substances. He also practiced environmental law in Portland, Oregon for Perkins Coie. He teaches an annual course on international environmental law at Stanford University’s Washington, D.C. program.