Previously, he served as the Director for Intellectual Property in the Office of the U.S. Trade Representative. In that capacity, he served as the lead negotiator for the IP chapter of several U.S. free trade agreements and chaired the Special 301 Sub-Committee. At Harvard, he is a Director of the Berkman Center for Internet and Society. He is also affiliated with the university’s Asia Center, Center for the Environment, and Fairbank Center for Chinese Studies, as well as the law school’s East Asian Legal Studies program.