Sean Donahue (Law ’92) served as law clerk to Ruth Bader Ginsburg, then of the U.S. Court of Appeals for the D.C. Circuit, and to Justice John Paul Stevens. After working at Jenner & Block’s Washington office and the Department of Justice’s Environmental and Natural Resources Division, he opened his own firm.  He has participated in several significant cases in the U.S. Supreme Court, including successfully briefing and arguing Environmental Defense v. Duke Energy Corp. for the petitioners, and serving as counsel of record for environmental and public-health organizations in major Clean Air Act cases in the Supreme Court’s 2013 and 2014 terms. 

Tom Lorenzen is a partner in Crowell & Moring’s Washington, D.C. office. He previously worked at the Department of Justice, where he oversaw many of the seminal environmental cases of the last decade. These include Massachusetts v. EPA, in which the Supreme Court affirmed EPA’s authority to regulate greenhouse gases under the Clean Air Act. In the D.C. Circuit and the other federal courts of appeals, he oversaw the government’s defense in Coalition for Responsible Regulation v. EPA, in which the court upheld EPA’s first suite of greenhouse-gas regulations; and numerous cases challenging EPA regulations governing emissions of hazardous air pollutants.