Ron Tenpas is one of the country’s preeminent environmental litigators. A former Assistant Attorney General (AAG) for the Environment and Natural Resources Division of the U.S. Department of Justice, Ron represents clients in civil and criminal investigations related to alleged environmental violations, imports and other matters. He also represents companies and trade associations in commenting on proposed regulations and in litigation challenging new regulatory provisions.
In counseling clients, Ron
draws upon 12 years of experience in the Justice Department. As AAG, a title he held from 2007 until 2009, he managed a 700-person division that
included 400 lawyers. He oversaw civil and criminal litigation arising under
more than 150 environmental and natural resources laws.
addition, as AAG Ron defended the government when the government was sued in connection
with its own use of natural resources. Ron
also advised Cabinet and White House officials on policy and litigation risks
associated with the environmental laws. Under Ron’s watch, the Justice Department secured
what was at the time the largest criminal penalty under the Clean Air Act.
Before he was appointed AAG, Ron served as an Associate Deputy Attorney
General, as the U.S. Attorney in the Southern District of Illinois, and as an
Assistant U.S. Attorney in the District of Maryland and the Middle District of
Florida. He investigated and tried white-collar matters related to healthcare
fraud and public corruption.
A Rhodes Scholar and editor-in-chief of the Virginia Law Review, Ron served as a clerk to Chief Justice William H. Rehnquist of the
U.S. Supreme Court.
Ron’s environmental practice
has been recognized by Chambers USA. A source quoted by Chambers
said Ron has "a unique combination of being
a skilled environmental lawyer and being able to clearly communicate to his
clients and develop a path forward" (2019).