William Berenson
Adjunct Professor of Law
E-mail: wberen@american.edu
William M. Berenson currently occupies the post of Principal Attorney and Chief of Litigation in the Department of Legal Services within the Office of the Secretary General of the Organization of American States. Since 1980, he has held a number of different legal positions for the Organization, including General Counsel, Acting Assistant Secretary for Legal Affairs, and Director of the Department of Legal Services. He is also an adjunct professor at American University's Washington College of Law, where since 1984, he has taught a survey course in United States law for foreign lawyers in the LL.M. international legal studies program. In recent years, he has served as a visiting law professor at both the Central University of Venezuela and the University of Chile.
He has also lectured in Latin American, the United States, and Africa on issues related to his practice and teaching, including: the privileges and immunities of public international organizations; the relationship between the United Nations and OAS; technical cooperation for development; the OAS Charter; the OAS and democratic development, including the Democratic Charter; the Inter-American System of Human Rights; privatization; estate taxation and planning, particularly for non-resident aliens; pension taxation, and constitutional law.
Mr. Berenson has worked in both the private and public sectors as a litigator and a legal advisor on a wide range of issues involving: tax, labor, corporate, energy, antitrust, development banking, estate planning, pensions, contracts, construction, real estate, transportation, immigration, trade, administrative, and public international law. He has also advised on privatization efforts in Latin America.
Currently Teaching
Areas of Specialization
- Constitutional Law
- Employee Benefits and Executive Compensation
- International Organizations
Degrees & Universities
- A.B, Dartmouth College
- M.A., Vanderbilt University
- Ph.D., Vanderbilt University
- J.D., Boston University Law School


