Hill has been teaching an environmental justice and sustainable development course at the Vermont Law School for the last 25 years as an Adjunct Professor of Law in the summer program. Hill taught an environmental justice course as an Adjunct Professor of Law at the American University Washington College of Law for 1 year. Hill taught a criminal law course and served as a Clinical Law Professor for the Prisoners’ Rights Clinic for 1 year at Antioch Law School. And Hill taught political science courses at Brooklyn College as an Adjunct Lecturer for 3 years.

Hill has lectured in the Middle East, Africa, South and Central America, and the Caribbean on the following topics: (1) establishing an environmental law and policy framework for national governments; (2) environmental justice and sustainable development; (3) capacity-building in environmental law for judges, prosecutors, government regulators, citizens, and the bar; (4) citizen involvement in the enforcement process; and (5) the impact of global warming on indigenous populations. Delivered the Distinguished Lecture (“Addressing Human Environment Challenges Related to the Need for Clean Water and Sanitation: A Silent Tsunami”) for the Trinidad & Tobago Environmental Commission, and the Supreme Court of Trinidad & Tobago (September 2011).

Hill retired from the federal service in 2015, where he most recently was the Senior Counsel for Environmental Governance at the Office of International and Tribal Affairs housed in the United States Environmental Protection Agency (EPA). Before this, Hill was the Director of the United States EPA’s Office of Environmental Justice, where he took the position in 1998. Before 1998, Hill was the United States Department of Interior’s Associate Solicitor in the Division of Conservation and Wildlife.

Hill is a Fellow of the American Bar Association’s American Bar Foundation. The American Bar Association also presented Hill with the “Award for Distinguished Achievement in Environmental Law and Policy.” Hill has held countless legal positions, such as law clerk to the Deputy Administrative Judge of New York City (Criminal Division), Legal Counsel to the Inspector General of the United States EPA, Assistant District Attorney in Brooklyn, New York, Special Counsel to the Corporation Counsel of the District of Columbia, and Project Manager of the Superfund Business Unit of ICF International.