Trained in both public health and the law, John is affiliated with the O’Neill Institute for National and Global Health Law at Georgetown University, where his work focuses primarily on women's and children's health in sub-Saharan Africa. He also conducts scholarship on public health law and ethics, with a particular focus on the ethical and legal limits of governmental action to address health concerns. Finally, he has an interest in road safety for vulnerable road users in both low-income settings and Washington, DC. His current and past projects have been with the George W. Bush Institute, the United Nations Special Envoy for Malaria, and the District of Columbia government.