John is an affiliate professor at the University of Washington School of Law, Seattle, where he has lectured on health regulatory law, healthcare competition, international law, and entrepreneurship. He also lectures regularly at the University of Michigan Ross School of Business, Ann Arbor and has held visiting research appointments at Oxford (socio-legal studies), Princeton (politics) and the University of California, Los Angeles (public health). He has been a member of the board of governors of the East-West Center in Honolulu, a visiting scholar in East European Studies with the Woodrow Wilson International Center for Scholars, and an Eisenhower Fellow to Northern Ireland.
John was nominated by President George W. Bush in 2007, and confirmed by the United States Senate in 2008, to serve as a member of the bipartisan United States Advisory Commission on Public Diplomacy. After working on the presidential campaigns of George H.W. Bush, he served from 1989 to 1992 with the U.S. Department of State under Secretary James A. Baker III. Following law school, he clerked for Senior Circuit Judge Albert V. Bryan of the U.S. 4th Circuit Court of Appeals.
For two decades, John served as general counsel and corporate affairs senior executive with publicly-traded companies in the biopharmaceutical and healthcare sectors. He practiced corporate and securities law with WilmerHale (then Hale and Dorr) in Boston and has been a senior advisor with Hogan Lovells in Washington.