Paul R. Williams is a professor at American University, where he teaches in the School of International Service and the Washington College of Law, holding the Rebecca Grazier Professorship in Law and International Relations. He is the president and co-founder of the Public International Law & Policy Group (PILPG), a Non-Governmental Organization (NGO) which provides pro bono assistance to countries and governments involved in peace negotiations, drafting post-conflict constitutions, and prosecuting war criminals, and was consultant at the London based Bosnian Institute for years.

The American University Washington College of Law is the law school of American University, a private research university in Washington, D.C. It is located on the western side of Tenley Circle in the Tenleytown section of northwest Washington, D.C. The school is accredited by the American Bar Association and a member of the AALS.